I can honestly say that it hasn't been so bad so far. We have between 60-80 people coming (more are trying to come, but I'm capping it off). In order to control the number of guests and stay in the know about who is coming, I've set it up with the resorts where no one can book a room except for me. So, guests email from my website with a quote request that includes how many to a room, what type of room and whether they're only doing the 3 nights at the first resort, or if they'll be joining us for another 4 nights at the second resort. From there, I return a quote that includes everything but airfare, and they know that they have to send a deposit just to RSVP! I've also set a date for the balance to be due. So far it has worked out lovely, and I am able to be in control of it all.