Enclave facilities

Mariposa Military Base
Temporary camp established for Enclave Patrolmen, scientists team of US Chemical Corps and construction crews performing excavations at destroyed old military base.

Hypothetical Outposts in California
According to AHS-9 the Enclave had hidden bases all over the shards of old California. Presence of the other outposts or bases than Camp Navarro were mentioned by technicians there, as well as fact, that there wasn't any outposts north from Navarro. According to Fallout Bible the Enclave had various other bases than the Poseidon oil rig installations, such as the one where Dr. Henry used to work with cyber-genetic research program. One of those places was a cybernetic maintenance facility. On the other hand President Richardson stated, that Navarro was an isolated base. There is also the possibility for the Enclave to have had bases, labs, or other facilities outside the Core Region, as evidenced by Raven's Rock and the Enclave's widespread power before the war. Given the latter fact, it is highly probable that the Enclave would have more facilities than just those seen in Fallout 2.

Though not technically part of the Enclave, many powerful corporations benefited from the Enclave’s actions and their research facilities were protected during the firestorm of 2077. Chief among these was Poseidon Energy, whose facilities continue to be used by the broken remnants of the Enclave following the Chosen One’s assassination of the Enclave’s U.S. President and the destruction of their Poseidon oil tanker headquarters off of the California coast.

Other possible Enclave outposts : There was no the Enclave presence concerned with the government-connected or Poseidon facilities like:
 * should have some person in charge,
 * were not default refueling stations for vertibirds, so it could have not vertibird landing pads and air traffic control facilities or it could be smaller then facilities present in Camp Navarro; Shi and Hubologists observed some vertibirs activity on San Francisco area, however Chosen One wasn't able to find any vertibirds there,
 * could have some communication facility and computer stations similar to ones present at Camp Navarro, operated by necessary staff,
 * could be hidden or as covered as Camp Navarro with its gas station, taken care by old Chris of ,
 * could be old government military facilities - like MacArthur Army Base) - or could be old Poseidon industrial or research facilities - like Camp Navarro,
 * could be installation, where dr. Henry used to work with cyber-genetic research program,
 * could be base for EC Company or at least the Enclave Patrolmen ,
 * could be marked as two lighting points in California on the world map at the Enclave Executive Office war room and shouldn't be in collision with AHS-9 stash,
 * Enclavers didn't like mainland, so service at one of mainland outposts could be a less preferred kind of work.
 * located in old California and near its borders: Hubologists HQ on the San Francisco airfield with space shuttle present, San Francisco and Los Angeles gasoline facilities, Sierra Army Depot, "Toxic Caves" storage area, Lost Hills Bunker, West Tech Research Facility or the Environmental Protection Agency,
 * located on Van Buren area : Hoover Dam, the Nursery, Bloomfield Space Center - where the Enclave members were present before the War only, Tibbets prison, Eagle Rock's AGRICOLA lab and not exactly governmental, but funded by military Boulder Dome or Senator Todd Peterson's secret bunker ,
 * Pentagon, located in the D.C..

Recruitment camp
Hypothetical recruitment outpost was a place, where replacements for Camp Navarro came form.
 * it should have some bureaucratic supply personnel - "paper-shuffling jackasses":
 * similar, but more numerous then Quartermaster present in Camp Navarro,
 * entitled to equip a new replacements with an Advanced Power Armor set, however not every time replacements could obtain it ,
 * they sent to Camp Navarro non-Enclave replacements, even women and mentally handicapped recruits ,
 * replacements could be informed there about Camp Navarro entry password and should obtain some identification papers, demanded by Camp Navarro senior staff during alerts,
 * non-Enclave candidates should have access there, so they shouldn't be attacked by the Enclave patrols, however some anti-spy filtration procedures should be performed there,
 * it was coping with replacements, so it could have a drill sergeant.

Cybernetic maintenance facility
Another then Camp Navarro the Enclave facility. Cybernetic maintenance was the equivalent of cybernetic janitorial duty and because of it dr. Henry didn't want to work there. It could be Poseidon research facility.

MacArthur Army Base
Encountered in northern Utah area a lost Enclave patrol members were arguing where they are (Utah-Colorado-Kansas belt). However it is not certain, if searched by them MacArthur Army Base was located somewhere there It is possible also, that they had place of departure different then MacArthur Army Base.

Remotely Controlled Facilities

 * Vault 13 - all clear signal, deathclaws insertion
 * Gecko Powerplant - communication with PoseidoNet