Your Battery is one of the most important parts of a good working Caravan, Check it regularly, Put a little vaseline on the terminals, and Keep it topped up with Power
DONT FORGET -
Drain ALL the water out of your caravan Turn the seats up on end to let the van breathe Make sure the Shower Hose is empty
Tyres
Always check your tyres for pressure and cracking, Tyres that stand all winter should be checked very carefully at the start of each season, and should be Changed every 4-5 years