I just came back from Yacht Club during super dee dooper busy time. The bus was only for Yacht and Beach & BoardWalk. Swan and Dolphin always only had their own busses. We would wlak to Epcot and MGM. No problems with busses or boats--phenomenal!
I'm 21 and my sis is 20, and we love, love, loved the pool area. Very large with lots of fun stuff to do. Youcan see the fireworks at night from Epcot, and will prolly see a few weddings at the gazebo, some may even ahve Mickey and Minnie in attendance. Of course you can only view form a distance, maybe 100 feet away.
Stroll through BoardWalk at night especially, its fun, festive, and cozy. Beach Club is excellent location and I know you will enjoy it.
I was originally afraid to try something new, but it is now the ultimatye Resort for our family to stay at on future trips.
And dont worry about super busy time--thats the ONLY time we vacation b/c its the only time we can. Take it easy, start out early, leave the parks when it gets too much, relax at pool or elsewhere, go back into parks at night and use Fastpass. Heres a tip--go to Epcot or MGM early on at opening. Go on your favorite rides till it gets crowded. Get a Fastpass or 2 if time allows. Then leave and do what you want. You can save the Fastpasses and use them later on in the SAME day when FP are completely used and lines are exceeding 2 hours. This works especially well for Mission Space and Test Track at Epcot.
Enjoy Beach Club--I'm very jealous b/c you will ahve an awesome trip!!!