DD
I am wondering if I am describing in adequate detail how I intend to use the velcro. My intention is to use it in a long vertical "strip" type fashion. Employ it as more of a strap of sorts. I won't have any velcro actually attached to the tube itself but rather it will go up and over the tube and the velcro will fasten upon itself rather than have a patch of it on the boat and a patch of it on the tube. A foot long strip of the stuff 2" wide should lock that puppy right down.

I think I will also "strap" my spare paddle in much the same way. Should be able to snug it right down so it doesn't bang around.