RV parked for a lengthy period

Thanks for the replies. To answer a couple questions -

The trailer was winterized for the 19/20 winter, but was not de-winterized in the spring/summer of 20, so it has sat as is since then. Battery was removed at the time of winterizing and has been on a maintenance/trickle charger since then.

I have periodically checked the interior and exterior. I anticipate it will remain so until the spring/summer of next year, at least.

Marv

For a travel trailer: Check the roof and reseal, check for any other leaks. Keep the battery watered and charged up. Keep the tires covered as much as possible. Otherwise, best to just leave it alone.

A motorhome also has to consider the drivetrain. Was it put away with a fresh oil change? Was the fuel treated and how long does the treatment last? Did you fog the cylinders? If you pickled the engine properly and haven't been driving it regularly, I would leave it alone and plan on going over the belts and hoses before the first trip. If you haven't properly put the drivetrain to bed, I would look at doing so now and include a 50 mile run before hand to boil off any moisture that may have made it into the motor.

On a TT I would cover the tires and call it good.

Now if you have power to it I would check the batteries every other month for fluid.

What do you mean it has not been winterized for 2020? Was it winterized for 2019 and never used again?

If trailer is easy to move, I'd hook up, take it for a 10 or so mile tow at speed to warm tires and bearings.

Jerry

One of the big issues is dry rot. Tires will dry rot in roughly 4 years when not used. They actually last much long when used periodically because heat brings protective chemicals to the surface of the tires.

Sunlight merely hastens the deterioration, but air alone will cause oxidation and dry rot. Typical tire dressings are cosmetic and may actually harm the tires. Aerospace 303 is water based, does not harm tires and may help prolong tire life. Before application you would need to wash the tires thoroughly on all sides. Spray on 303 and rub in on to every bit of the tire surface (excluding the tread). You need to re-apply every few months especially on the outside surfaces where rain water will wash of the treatment.

In any case carefully check your tires before the first trip and keep an eye on them for cracking after you start to use them.

Have you pulled the batteries and periodically check the charge?

Do you have a generator stored separately and used at least a few times a year?

I would also inspect every square inch inside and out checking for leaks or sealant issues.