It can always be difficult to decide whether to stay put or venture out for help in such situations.
Many years ago though I actually quite enjoyed getting trapped by snow. The school I taught at had closed early because of the weather conditions and my mate was giving me a lift home in his car. We got as far as the Park Square roundabout in the city centre (where all Sheffield's main roads meet) and ground to a halt. There was an ambulance in the lane next to us, with it's blue lights flashing. As that couldn't move for ages, it was clear that we wouldn't either, so my mate managed to pull onto the side of the road and we sought out somewhere for a coffee.
As my mate was our Head of Drama, he decided that the Crucible Theatre was the best place to go. When we got there we found the staff begging us to watch the pantomime for free because only 20 kids had managed to turn up (to a 1000 seat theatre!) for the show. They were worried that there wouldn't be enough 'atmosphere' for the kids to really enjoy the pantomime, so we got free seats on condition that we each had to boo, cheer and shout 'He's behind you!' as loud as 100 kids could. We had a fantastic time ;-)