I bought a couple of cloth litter bags from a dollar store. The bags have velcro straps on them. I keep them on the proper sides, and hang them over the backs of the helm and mate chairs when I'm going to use them. These bags are pretty durable for only a couple of bucks. They even came in colors so they match the boat trim.
I just picked up some storage bags @ Northwoods for my in-line planer boards. They were $4 each. It's nice to have these things somewhat organized.