When you are camping I would recommend disconnecting your trailer wiring from your tow vehicle so that as the trailer battery gets discharged it does not drain the vehicle battery too. Having them connected will allow the trailer battery to last much longer but at the cost of potentially leaving you stranded!
We do have a vehicle jump starter though that can help start a vehicle with a dead battery. For that check out the Peak Jump Starter part # PKC0J7. view full answer...
Since your MH is based on a Ford F-450 chassis their model 6 windshield cover # 052963786347 should work fine since it is intended for Class-C motorhomes. view full answer...