Technique and weight have much to do with righting a 16. I've capsized a 16 solo, and at 220# twice righted it alone without a righting bag and twice needed help from a passing boat.
- put the mast into the wind; I've held onto the bow and created a sea anchor so the mast weather-vaned closer to the wind
- loosen the main and jib sheets and main traveler; you can't lift the water tightened sails can hold2
- tie knots, or loops, in your righting line for grip
- dunk your mast into the lake (unattached to the boat and before your next outing) to check for leaks
- don't solo when you're the only one on the lake, but if that's not an option, try not to capsize by letting out the main traveler
In my experience, the most difficult part is getting the tip of the mast about two feet above the water to reach the righting moment.
Having to reattach shrouds sounds like a major pain in the butt while sailing solo
Yeah, shroud extenders sound like they're for bigger Hobies like the 20 or 21, and reattaching the shroud anchors requires going ashore.