Sounds like you're on the right track (pun intended). The best way I've found was take the valve cores out, suck all the air out of the tires then just put the valve caps on. Put track on either the front or back tire then walk track on the rest of the way by pulling it around from the top. If you can run it back with just one track then I'd do that. Once you're home use a shop vac to suck all the air out. I draw them down so far they will actually form a triangle. Hope this helps.
What it lacks in ground clearance it makes up for with traction.