Here are some things I've picked up, or come up with, over the years on the TK Vegas board related to in-suite receptions:
- Tell the casino you're having a reception; or not? If you are getting married in a casino-run chapel via the casino's wedding coordinators, then the general consensus is that you should book your in-suite reception room through that coordinator as you'll not only get a discount but the running theory is you'll be protected from your room being given to someone else (this did happen to someone at Mandalay; see their article for more info). If you're using a third party caterer, bartender, etc. AND you're not getting the room through the wedding coordinator, definitely don't tell the hotel you're having a reception; you don't want to draw attention to the fact that you're not using their catering.
- The large-size suites commonly used for in-suite receptions are sometimes on restricted floors of the various hotels since casinos will put big gamblers in them; you may want to check in advance if this is the case at the place you're planning to book a room since you may need to make arrangements for someone to stand guard in the lobby for taking care of getting guests up to that floor. An example of this would be the penthouse tower at the Palms; you need to show a room key to a security guard to even get to the elevators (at least as of late 2011).
- If you're going to bring in, or have a third party (like your DJ) bring in additional lighting such as up-lighting, color wheels, etc. I would strongly recommend avoiding incandescent lights; i.e. the hot ones that burn you if you touch them while they're on. Those lights generate a lot of heat, and the A/C in a hotel guest room is not designed to cope with 30+ people and a bunch of hot lights in the room, so it can heat up quickly. LED-based lights don't give off the heat so that's the way to go.