Actually, size doesn't matter. Yeah, I know... everyone expected that. It's true, though. We of the West Coast Gatherings have hosted in HUGE Beverly Hills hotels and tiny little motels on the outskirts of the Sac area.
You DO want to mention having guests, and that they're rather boisterous. Have your event EARLY, so the noise isn't something to wake guests, etc. Do get the hotel/motel staff to distance you, if possible. If you have others staying there, from remote points, we found, at NEST, that getting all the rooms at the end of a hall worked well. No one of US was going to complain about tickling noise...
Bring lliquids at the very least. Some finger food is recommended. Feed your 'lees, sayeth Bella.
Bondage needs to be practiced EXTREMELY carefully, 'cause you're guaranteed a surface you've not used before. Arrange the "fittings" before the event, and discretely tuck them away. It's a mood-killer, we've found, to wait to have them rigged, mid-scene.
Four-point-spread can be a tense thing for a new 'lee. Simpler bondage can be more useful, in such cases. Tied to a chair, with feet up on a bed is a simple binding that's easily held (pillow across the legs to manually restrain easily and gently). If using four-point, use arms out to sides as much as possible. You lose blood in the extremities if they're above the head. Kills the scene when the 'lee can't feel fingers 'cause they're asleep.
Cost - Danimal eats cost on these if no one contributes. Was easier for me, 'cause I made crazy money back then, but I can't stress enough how USEFUL it is to the folks paying if guests discretely pass a tip along. If you can't afford a lot, give a little. Bring some food and drink. Do what you can. If you make crazy money, kick down for it. It's well worth it. I still ain't sorry for the expense.
Hotels are there to serve you, kiddies. You're having a social meet. Far as THEY are concerned, you're old friends, or business acquaintences. They have bachelor parties, business parties that turn to near orgies, and much more extreme things than a bunch of *gasp* ticklers. Just saying, "We're an online social group of geeks around California" will weed out most interest. Weirdos abound, after all. Anyone that's worked in hotels can tell ya that.
Look at it this way - I've hosted several in the Sac area, one in LA, and played a few at NEST, and no one did more than ask us to lower the volume after 10pm. This is where one learns the difference between a complete gag and a partial. Useful to know. Important that the 'lee gets plenty of air... 'Sides, it's important to hear all that delightful laughter.
I can give ya additional info. Just ain't thinkin' of it now. Danimal and Ter have been there. They'll host it well. I've a great deal of faith in them both.
Peace,
dvnc