I usually try to put the trailer up on cinderblocks to get the wheels off the ground during long-term storage. Next year I need to replace the wheels anyway, so I didn't bother this winter.
One thing to note. If you store your boat under a tarp with the mast as an A-frame. You need to be careful about how much weight from snow/rain builds up on the tarp. One time I noticed a lot of water had pooled on a tarp, and it bent the mast quite heavily (the mast had rolled with it's side facing up rather than the stronger front facing up).
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Thats a good point about using the mast that way. I need to cover a larger boat this winter (should probably be shrink wrapped) and was going to do that but I will figure out something else.
