The thing to remember is... most likely their first thought if you bring bunch of gear in will *not* be "Oh, I bet he's shooting porn." More likely "Oh, he's probably an indie filmmaker."

Now... if you bring in a bunch of gear and a gaggle of cute guys who are 18-22 and all look gay... you're probably going to pique somebody's suspicions. So the solution is...

1. Larger hotel where individual guests coming in aren't as readily noticed.

2. If at a smaller hotel, have some of the guys wait in the car for like 5 minutes, then mosey in, one at a time, after you've gone in.

3. Get a hotel with alternate cardkey-access entry points and use them.

All of these assume you haven't made a deal on the up-and-up with the hotel; a lot of hotels are surprisingly OK and nonjudgemental about it as long as their individual property isn't identifiable (or, in the case of the Blue Moon and other places like it, as long as the hotel *is* identifiable.)