Storing on grass during winter

No proof but I think some types of grass or soil in different parts of the country give off more salt than others. Again no proof.

I park mine on grass and have had no problems but have spoke with people that said they had problems with rust after parking long term on grass.

I don't think it's necessary to park it on a tarp, especially if you have air flow underneath the unit to help dry out moisture.

Why not make a gravel parking pad? It's easy and relatively cheap.

Never had an RV over winter, but for my other trailers that get parked long term, I always just put a board under the tires, wide enough so the tire isn't "hangin" off the edge of the board. Also a board under the jack foot. That is all I plan on doing to our TT this year also. Maybe some thick rubber over the tires.

I would imagine a tarp under the camper will get really nasty by the time spring rolls around. It will trap water on top of the tarp and you'll end up with frozen puddles on the tarp all winter. Probably better just letting the yard breath under the camper. Plus under the tarp is inviting to critters you may not want LOL

Whichever way you go, good luck! Have fun camping this coming weekend!!

I might run it up onto 2x10's if it tends to get soggy where it is stored in the spring. Will distribute the weight over more area and be easier to get out in the spring.

Rubber mats are fine, just anything to get the tires off the ground, or in your case grass. I purchased Camco plastic levelers and when our MH is going to sit for a while I drive it on them to get the tires off the concrete.

Why would you need a tarp under it?