OK
After the storm the inside was basically dry. I have not yet installed a tailgate seal, so there was a little dampness in the very back. The Ranger has high sides, so there is still about 9 1/2 inches of height left under the canister. You lose about 12 inches of length if you need to load...
My Retrax cover arrived, will install it this weekend. Also, step bars are scheduled for delivery Tuesday.
Pictures will be posted as installs complete.