Funny you mention wild camping. I have thought that a hammock with canopy would be perfect for this!
Alas I suspect it is a similar problem as you are getting at. The best wild camping in the US Midwest is on uninhabited islands in the Great Lakes. Unfortunately, said lakes never get all that warm, so during the day you might hit high 80’s, but it reliably drops at night to low 60’s or high 50’s. Same problem near shore.
