Overflow can be a royal pain-in-the-ass. I've gone through a few times. One time ended up thigh-deep in the stuff at -40 something. Wasn't fun. I was a long way from the cabin. It's a risky business.
Fortunately it was only as deep as my boots, so wet feet and socks. But man, that nice light tundra get's aweful heavy when the track is packed full of slush.
My boy managed to get across the overflow and into nice deep wet snow before getting stuck the second time. He saw some open water and wisely shut the machine down. After walking through the overflow and digging the snow I was able to get the nose and tracked moved enough to climb out of the hole he parked it in and powered back across the overflow. He got to walk back
I found a good thread on what to do when dealing with a stuck in overflow situation:
http://www.dootalk.com/forums/index.php?showtopic=448197I need to add a few items into the don't leave the trailhead without it kit.