Tom,
A fleet used to vacate Main Operating Bases and would deploy off-piste at a certain readiness state. The thinking was the MOBs were static, easy to find and would have been severely twatted shortly after kick-off. Deployed locations would often be only 30 or 40 miles from the Forward Edge of the Battle Area (FEBA) (cue sniping comments from those sans flaps on their boots) to ensure a very high sortie rate to support the pongos.
Deployment sites included options, such as bulldozing the contents of supermarkets rearwards (having secured alcohol & porn, obviously) to make hangar space and going up tiddly up up (and down) from the car park.
Aircraft were also deployed in the extensive forests, taking off from grass, tin strips, 'C'-class roads or autobahns. Even though one ate and slept there, it was, frankly, difficult to find your 75ft-square tin landing pad, in the average weather, from an IP to target run which started at ~450kn and ended at 0kn. We were reasonably sure the average Ruski on his first away match would have had a devil of a job to see anything of these sites.
Other contributors on these forums were better informed of the more closely-guarded plans. You could try a PM to noprobsbob.
Good luck.