I've been trying to do the same thing. Even though I can't take more than one one hour private lesson a week, I've been trying to stretch and workout extra hard at the gym, trying to increase my power for tumbling passes with squat jumps onto a step, doing press handstands against a wall, pull-ups, leg lifts (I think people there think I'm a little nuts). I also take an hour of yoga once a week. I think these little things make a huge difference.
I know of a gym about 45 minutes away from me that has open gym time so I may try to start going there too to practice actual skills a little more too. Maybe this will help me be ready to compete or go to camp or whatever I decide to do.