I have an extended family trip coming up in August. Trying to get a large group to all agree is very tough. It's hard to get folks to make early commitments especially when they are trying to understand the cost for airfare, car rental, park tickets, dining and special events. This can be a bit overwhelming for a newbie. I gave my party suggestions on which park ticket to purchase, which restaurants I was going to and gave them direct links to the full list of options at allearsnet.com.
I've borrowed & rented points (transferred into my acct) for my gathering. I've changed our lodging reservations several times. I figured worse case scenario, I can always rent any extra points if I had any last minute cancellations. Thank goodness it didn't come to that.
Suggestions:
(1) To increase your chances of having your rooms close together - Get a Grand Gathering number. You don't have to do a grand gathering event in order to get a grand gathering number.
(2) Look at all lodging options. I really really wanted to stay at SSR GV but decided to give it up (too many pts). I bought SSR because I want to stay at SSR. I love it. I didn't look at OKW until 3 months ago when I realized that I could get an OKW GV for much less (45 pts vs 79 pts). I was able to get 3 nights at OKW GV. I wish I considered OKW earlier but at least I'll get a chance to stay at SSR for part of our trip.
(3) Grand Gathering Events look very interesting but they are very expensive (for most of the events, you can get two character meals for the price of one grand gathering event) so I decided to do the character meals instead. We're also doing a fireworks cruise on the Grand1 (my surprise) and the Epcot Seas Aqua Tour.
(4) There are a limited number of large tables so the dining folks recommend making reservations on the very first day ADRs become available. It was hard to get folks to commit to dining so I only made one reservation with a large table for 12. All of my other ADRs are separate - One for the folks I was paying for and the other for the folks who could not make a commitment. I would love to sit together but I didn't want to risk losing my reservation if they decided to cancel. Actually I still don't know if they're going to go and it's less than a month away. I got tired of asking

I won't ask again until a couple of days before each ADR and then I'll cancel their ADR if they decide not to go.
(5) Make a tentative daily schedule of what you're planning to do while you're there and they can decide if they want to join you. Most of my party will probably join me therefore my daily schedule covers all of the parks and all of the evening shows. I borrowed Tagrel format - tagrel.com/TR/July2006/index.shtml.
Good Luck