Re: What is the best way to Tarp a sailboat for winter
Where the two tarps came together at the mast, I used short lengths of twine to tie the gromets together. There is a little space around the mast, I guess, but I had it pretty tight.
There are openings at both the back and front, a good thing in my view to let air flow through. The only idea is to keep snow/rain/ice/leaves from dropping directly down onto the boat and building up around the hardware, etc. Snow/rain slid right off my tarps all winter. Let's not forget these are boats, not some antique furniture, a little weather will not hurt them.
Also, I am in Vermont (this is in the Islands, actually, between VT and NY). Probably similar to your winters.