The guy I used to crew for on H16`s once sailed the boat solo from one cat club to another on the dam we used to sail on, about a 42km (26 mile)return trip. I do remember that he did battle to tack, but managed. We were following him on my boat to make sure he had assistance in the event of a capsize. He did go over, and managed to right it by himself. I reckon he weighed 85kg at the time (187lbs). He used the jib halyard to rake the mast more upright, and the boat handled fine. From a safety perspective, it was on an inland lake & he had us as a backup to either assist or report his position if things got tricky.
Like sailing anything solo, take the necessary safety precautions, let someone know your intended route, or have a buddy sail alongside for backup.

P.S :The same guy won the single-handed race round the island on the same dam a few years later on a Hobie Tiger, and it was blowin` !!

Cheers
Steve