I asked this very same question in another forum, tried most of the suggestions, and ended up as follows:
I have an 8' bucks bag and a 4-piece Sage 9140-4. To attach it, I simply disjoint the rod into two equal length halves and flip the tip of the rod so that it is adjacent to the butt. I then velcro the rod to the rails. The reel end of the rod is aft (behind me near the anchor). Finally, I always approach shore feet-first.
The velcro strips cost me less than $5.00 and I'm in and out of the boat as quick as anyone.
There are lots of inventive and clever solutions out there. Good luck.