Wonder if you could get foiling with a Wadoo Subnato attached to a Foil? It's right about at the threshold for enough thrust to keep moving an efficient foil. Maybe a bit of pumping/paddling could do it.
I've mostly been launching at the blind channel, end of the path past the SWS pickup. Sometimes can make it out with only a few tacks if the wind and current are right. Sometimes have to paddle out to the floatplane dock. You try prone paddling with the crusader? Imagine that could work well, paddling on my prone board isn't too bad.