Ed, if they are still available on E-Bay, there are lifting handles for the Bonneville, that bolt onto the top of the rear shock and the frame under the saddle. I have this on my '12 and it makes getting it on the centerstand much easier, especially since I put a rear rack on the bike which made it much harder to grab the rear frame rail, due to it reducing the clearance. I just get the handlebars straight, put my right foot on the centerstand pad, grab the handle and pull back while putting all my weight on the pad. Not too hard a job, even for my, umm, err, ahh "advanced" years.
Jim