Several weeks ago, I brought home a really good-looking 1963
Safari. It pulled great. It has a straight body with only a few dents and scratches. The interior actually looked good. It had been renovated 'after a fashion'. Interestingly, it has an 8,000 lb axle. The floor had been covered with OSB, then stick down tile. There is a dinette, kitchen area, side toilet, and double bed in rear. I decided that I would take out the double bed and investigate the rear. Boy, am I glad I did! The toilet and sink both drained into a large wooden pan which was lined with fiberglass. There was a 4 inch pipe which drained out on the ground. There was no water access to the toilet to assist with flushing. The fiberglass/wood 'tank' had leaked on the rear floor which had rotted through and the frame under the rear is badly rusted. Nothing which cannot be repaired, but I am surprised by the wood/fiberglass tank which drained directly to the ground.
My tentative plan is to put in a typical gray water tank and a solar powered composting toilet.