Granted you may not be able to do this at Lake Lanier, but ...

...when by myself ...

I use a small anchor with a buoy attached and leave this on the tramp while launching...I roll my boat into the water, drop the anchor and tie the boat off to the front stays while I raise the mainsail. When I'm ready I tie off the beach wheels to the anchored buoy and just leave them floating offshore.

This way I don't have to beach the boat on the way out or the way in.

NOTE: If you launch from the same spot all the time, you can put a screw anchor offshore with a buoy attached.