While I was home, a friend kindly built out the back of Jeep with a sleeping platform.
We went to Home Depot one weekday night; and then (5) 2x4's, (3) small sections of MDF (total right under 70$ with screws), & 3 hours of work later- I had a platform. Add a nice mattress topper, a sheet, sleeping bag, and pillow & I have a bed!
The following are photos of the start of the process & the finished product (it was a bit too dark to get any other photos while he worked on it). Feel free to ask questions!