TGarner;
Vulching is a perfectly sound method for capping a field, and often used. If you do get up from a capped field, you are pretty much a sitting duck anyway. One contingent of cappers will be suppressing hostile takeoffs, another might be chasing down the runners.
If you do decide to takeoff from a capped base I would suggest one that is on a mountain top.
I generally take off from capped fields "Only for the Fun of it", and rarely.
I also enjoy strafing birds on the runway trying to take off.
Mino