Got hung up and could not move. How did I get out?

Dick, I'm assuming that the tag was up to the highest point as well.
It happened to me going up a slope and the drive wheels ended up higher than the tag and just started to spin on the gravel. Like you I lowered the front air and let it roll backwards to get traction. I then took a run at it with the tag up as high as it would go and went up no problem. Tom