Could a small sea anchor/drogue also be used as a righting bag? Seems like that would be ideal. In light air you could use it as a righting bag, and in heavy air you could use it as a sea anchor to keep the bows into the wind to aid righting and keep the boat from sailing away without you after it is righted.

And a sea anchor/drogue is very lightweight material and stores in a very small space.

And a sea anchor can be useful for safety in other situations -- like to slow your drift if you are capsized and being blown toward a lee, rocky shore or into a shipping lane. Or if one person is separated from the boat and the crew member on the boat needs to slow the drift so the man overboard can have a chance of swimming to it. (If the boat is on its side, the sea anchor sort of feathers the boat into the wind so the wind is not pushing directly against the trampoline.)

Just an idea.