Mike, I would think that finding a way to tie things down to your yak would be near the top of your list. Here is the best rod leashing solution I have found so far.
I have to thank Fongman for this great rod leash idea. I modified his idea a bit so it works best for me. Go to Home Depot, Walmart, Lowe's or just about anywhere and pick up some tarp tie-downs. You can use them right out of the package or modify them as I did by adding a rubber sleeve which makes them rigid.
Attach them to every rod holder. When you have a rod in the holder, simply stretch the bungee over the reel handle and your gear will stay on board during just about any disaster. Here are some photos.
Bob
