I usually start keeping track of available sites a week or so before I can make my reservation. Then start crossing them off on a daily basis. The night before, I start looking at the site pictures to narrow down my choice of sites to just a few. At 7:00:00 I hit the reserve button for the site I want. Sometimes you get lucky, sometimes you don't. I haven't been able to get a site at Kilbear for 3 years now.
Sleeping bags for us.
Singles for the kids with a sheet underneath to keep their toys contained, and a queen size sleeping bag for us.
When it's warm, I just use the 1 leg/1 arm air conditioner.
Now with the hard side, the kids still use their sleeping bags in the bunks, but we have converted to sheets and comforters since the comforter was included in the décor.