You always have expected winners. In normal 1v1, you expect Lain/Shugo, then a pool of 8 for the rest of the top 5. In Mid tiers, you'd have Quivo and Y.b.M., then a bit more variety I guess but the money is decided. In low tiers, I'd actually expect Lain/Other top player for top 2, then a low tier main. Unless you do something crazy like All Items Wario Ware Random FFAs, or an obscure game like Duelist, you can expect certain people to win any event.
Also, Lumi, the best way to get a good sleeping spot is to go to sleep early. Once a person is asleep somewhere, that is their sleeping spot. No one wants to be the **** who wakes some guy up. Though you may get disturbed when some one goes foot to face with you on a couch if some one is daring enough. That, or once you find a place you want to sleep, do not move at all. Wiis tend to be everywhere so you can just play till you sleep, or just sit there and wait. No one can call a spot you are already in, and even if they did after awhile people stop caring.
The latter is my plan to get a couch when I come to this.
With the original side events, I vote for 2v2 LTs.