I've  been using the golf club tubes for many years - I bring an old fishing rod with metal guides - the metal guids are smaller outside diameter since they don't have to accomodate a ceramic insert (except for the tip) - when I'm travelling, I slip the top half of the rod thru the bottom half guides and rubber band together at the handle - I can slip the whole rod into the tube, right up to the reel, so the whole rod is protected.  I just tie mine in to the thwarts or gunwales or whatever is handy - works for me.