Just returned from a trip with our new 172 from Wisconsin to California and back. Logged a lot of miles, went to many state and national parks, and also stayed in a few RV parks. About half the time was boondocking. We are not sure how long we could have gone, but 4 days at a time was not issue. The battery was down to half after 4 days. We did not know how to gauge how much propane was in the tank but when we had it topped off half way through the trip, it only took 2 gallons.
We had a great trip with no major problems. We pulled it with a 2012 Toyota Highlander. The only real issue we had was the E2 hitch brackets kept moving and causing the bars to catch at times. We also had some water in the back window with driving rain, but it was serious rain. We actually left the pod in Texas so that we can resume our adventures in March and we are already planning the fall trip.