I would choose Ohana, just because I love it.
I'd invite both Lilo and Stitch (so someone can help keep Stitch under control) and Ariel, Flounder, and Sebastian (assuming they'd be ok out of the water).
I feel like this question should get its own topic?
If you lived in some alternate Disney universe, which prince or princess (depending on your gender and orientation) would you want to date? Assuming they're not linked up already.