Canvas Cover for Life Raft Canister

Hey Old Phart, (I just had to say that),

I just got done putting the cradle together and am going to the boat to throw my back out while trying to get the life raft on board. I was thinking about putting it on the bow but I won't be able to use bolts due to the ceiling material in the V berth. There is a nice spot on the back of the fly bridge but that will take up party real estate. So I'm back to the bow with screws. What do you think about screws? It makes me nervous.