Thanks for the suggestions Rick!

I guess I just haven't had enough practice yet to do the hull-riding trick. I've been so happily surprised when the boat pops up so quickly & easily, my main concern was dodging the high-side hull as it dropped.

Next time it happens, I'll try to remember to drop and roll with the low hull; and if that doesn't work, I'll go to the rear crossbar.

Mary added her post while I was typing my reply...

I thought about a solid pipe with a 6" elbow at each end, attached to the front crossbar at one side, which could swing down for a step, then swing up parallel to (and clipped to) the crossbar. The hull would limit the travel to the side, but how to attach it so it wouldn't move fore or aft...

If you had the bow spreader, I think my carbiner on the righting line would be a simple solution.