Here a few things you should consider for seasonal RV Storage?
Take out your battery and store it too. Always take off the negative terminal first.
You will need to add fuel stabilizer to your RV while it is in storage. Put fuel in the vehicle and add the stabilizer.
Change the oil before storing your RV.
Clean and Check all Seals. Before placing the RV in storage give it a good wash and wax.
Ventilation. Keeping moisture out of the RV is a major concern. ...
Plumbing and Tanks