Mine actually ended up on the next door neighbour's roof on the day the trees blew down in Stanley Park. I have the shelter tied to the boat trailer now.
The heavy silver tarp definitely helps, as well as loctiting the turnbuckles to the stringer rods.
I had to remove snow twice daily while it was falling.
Check the roof on your house...I had to do some emergency bracing last night because two mid braces pulled out. Being up on the roof at 4 Am removing slushy ice is not my idea of fun, but it had to be done.