I can't find the post about a main sheet cam cleat, but I highly recommend both it and Sidekick for what your trying to do.
Checkout these posts on a huli with Sidekick, furling with a homemade device, and a quick release system for the main sheet.
The huli was due to two things.
1. I did not furl the sail and overdrove the Sidekick system so the plastic insert sheared.
2. After the ama broke off, I failed to release cam cleat, or quick release fast enough. So practice.
Doing what your doing I might beef the plastic joint up with an outer PVC sleeve of some sort that you slide back over the joint when the aka has been inserted into the center crosspiece. Then secure it so it doesn't slip. Duct tape should do the job OK. I presume you will leave it rigged for long periods.
If you do huli from wave action alone (I never have), make sure you have a knife to cut the tape. You may have to remove one ama to right the yak. I did not have to do while practicing in calm waters with both ama attached. Try it.
Although you can furl the sail by hand you might want a device to do so. Your fellow countryman has designed a device to do so.
There was another Aussie that used a trailer double V roller drilled out and placed on the mast to do what stringy has done. The guys moniker was "Choke". But I haven't seen him here for awhile and his pics appear to have been deleted from photobucket.
Here's a quick release for the clew.
I've since modified that a bit by just tucking the bitter end of the main sheet back through the loop. Practice that a bit until you have the right length to grab and have just a short piece of the sheet to pull out from the pinched loop.
I would also practice striking the sail if you encounter severe winds. You will need a loop of bungie cord hung off the front hatch to poke the bottom
end of the mast through. The top should fit over the sidekick aka, but still be secured with the regular paddle bungee on the side. (I used stbd). You don't want the top part of the sail facing oncoming water.
Sidekick , depending on your stroke, may interfere a bit with paddling (assume you want to sometimes give your legs a break). If you do a higher entry, and quicker withdrawal you should be OK. Move your seatup to the fwd position if your height permits it. Sometimes a few inches are all you need.
Another thing you can do is mount Sidekick further aft. It will, from reports posted here, work just as well another foot or two aft. Of course then you have tank well segmentation. If that's Ok, could be a good solution.
With the small sail I again highly
(emphasis) recommend Sidekick for what your trying to do.[/b]