If the landing gear is installed, it is a one man job. If the trailer is properly configured. I can load and unload my RV-12 by myself, but I need a helper to install/remove the wings.
If you PM me your email address, I'll send you some pictures of my trailer setup. I have promised to post my drawings and a material list to some other folks on this forum, but I have been too busy flying. My other excuse is that I want to make sure I have all the bugs out of the design. My wife and I can unload and assemble in about 15 minutes so I think the trailer is pretty good.