I know what you're saying about the sleeping in his bed thing, but it definitely would be cool to spend some quality time in his bedroom, simply because of how much time he spent in there and how strong his presence would likely be felt up there. If possible, I would probably want to lie in his bed at least long enough to get his perspective (visually speaking) on the room, with the air conditioner cranked, of course--I'm like that anyway--the TV on but silent, with gospel music coming from one radio and country playing on the other, the closed-circuit TV monitors on and scanning the crowd out front and the people downstairs, etc.
Some people might think that would be uninteresting or that it reflects upon a sad time in his life, but it would just be a way to connect with him a little...in some way.
But the thing I would really love to do would be to set up a recording studio in the Jungle Room just as he had it in '76, and sing the songs that he sang there. That would be just about the ultimate.
I'd have to ride one of his golf carts or other fun vehicles around the yard.
If not for the displays which are there now, I'd play some racquetball, then relax in the hot tub.
I agree that doing these types of things would really be a blast with a group of friends who love Elvis as much as you do. Simply hanging out in the living room, one of the basement rooms, the Jungle Room, the racquetball building or wherever with a group to share the moment with would be amazing.
What to take? I need to think some more about that one.