Cheryl, if you are considering building a simple frame to keep the tarps off the canoes I can attest that the pitch of the steep A frame slope sheds snow loads nicely.
There are 2x4 and even 4x4 brackets that hold support ends /\ in place. The old swing set has some beefy 4x4 brackets secured with lag bolts, but even a set of sawhorse brackets and 2x4’s should work.
https://www.homedepot.com/p/HDX-5-5-in- ... /303652579Maybe something like this (used when I need vertical storage for boats in the shop) , but much taller, with an unoccupied top crossbar to drape the HD tarp over away from the boats, and a couple lower crossbars for end slide-in hull storage.
P2020028 by
Mike McCrea, on Flickr
The brown HD tarps on the firewood shed are secured with screws through fender washers at the tarp grommets, and elsewhere through the tarp material itself along the frame. It doesn’t even flap in the wind, which would be noisy disturbing, and probably tarp destructive over time.
FWIW the “feet” of that swingset A frame wood shed are concreted in the ground, and it has withstood a mini-tornado/microburst that shattered trees on the far side of the house. Anchor the A frame securely to the deck if you go that route; there are ready made base brackets for that as well*.
*Not meaning to disparage your carpentry or design skills. If there is a bracket or “hurricane tie” made for the connection I’ll go that route instead of cobbing together something my own.