We also wanted air conditioning but did not want the expense of a roof unit so I built a small 2' wall and installed a 5000btu window unit. It does a real good job of keeping the place cool. I have insulated most of the CT with the 1" foam. Under the air I screwed in a funnel and connected a hose for all the condensate to drain on the ground.
In the front area where the CT bows out I built 2 counter tops, one over the other. And below I have a nice large area for bigger things that I can control with the bungie cords.
We took our initial trip 2 weeks ago. And it went as good as can be expected. We had almost 5" of rain over the 3 days. It would come down in buckets for hours and then the sun would come out for a few and then the rain returned. Putting jacks under the ramp made a nice little porch and kept us nice and dry.
If you want to really find out what you need or what you don't need while camping in general, go during the rain. It will tell you alot.
Much better than a tent, cheaper than an overpriced RV and you can customize it to your needs. It doesn't get any better than this!
