I keep my paddle across my lap, or within easy reach. I do get line tangled around it occasionally but I figure that is just part of the nature of fly fishing. I have an anchor I made out of two old window weights. The rope is attached on one end instead of the middle so if my yak moves too much it lifts the end and slides over most rock structure. It has only ever got hung once in 4 years, and that day was exceptionally windy, I should not have ever launched.
don't go ninja'n anybody don't need ninja'n
One last drift effort