It's one of the things I liked when I had a DA Canterbury sidecar attached to an A10 way back - just leave it in gear and get off. No stands to worry about, no balancing needed and a firm platform to kick it over. Also, and this is the one, you could drive it with your left elbow resting on the top of the sidecar - and look really cool!
By-the-way I've always kicked bikes over with my right foot, never the left. I don't think I could do it that way without falling over, and like Swarfy I tend to get it on compression and do a little jump and all my 13 st goes down on the kickstart - never fails.