Welcome Cantputt
My last big trip I stopped off at the Grand Canyon for two day in April. On the last day I meet two guys there, both were amateurs photographers, both cursing the fact the clouds dissipated before the sun came up totally washing out the scene. These guy drove for days to get there hoping on the right lighting and weather conditions. One camped in his SUV, other in a Jeep and tent. I hope you have better luck when you are out shooting wildlife.
For a camper to fit your needs my I suggest the
Nano Weekender. This campers are designed for a 4x8 base, uses a single sheet of plywood for the sides so no splicing to get bigger sheets or buying 5x8 $$ sheets. Simple galley. Easy to build flat angles no bending wood. This is a one of Mike’s many planes. Not sure if anyone has build one as of yet but two guys are looking into the design. Other camper along this same line are Weekenders, Rockhoppers and the Sunhopper. All are bigger but built using the same simple idea. Take a few min to click on the hall of fame gallery link at the top of the main page for so many picture of nice campers your head will spin.
GL in picking out your favorate and have fun building.