...and look at it this way. Even if EVERY SINGLE venue employee had a picture of you in their hand at Santa Barbara, AND they were looking for you, the chances of them pulling you out of a crowd of PJ fans is slim. You'd probably have a better chance getting a hummer from a lesbian.
Seriously, don't worry about it. It certainly is a stressful situation, and I don't envy your having to go through it, but you'll be just fine for the next shows.
TIP OF THE DAY: Don't look like you're miserable when you're stealthing. I can often pick the folks in a crowd just by their drab, bored looking stare. Smile, look stoned, and enjoy your tape!