I don't know the location well but is this just a trail ride or actual moutain riding just on a trail? Even if just trail, everyone should ALWAYS have a shovel in their pack..
It was a regular trail that is very popular and a main access to all the better mountain riding terrain.
When I was on it, it hadn't been groomed in several weeks, and no longer existed as a trail, it was a series of several hundred drifts that varied from 1ft upwards to 8ft, where you would ride up and down from one to the next.
I suppose by the time we got to the top of the trail, given the snow conditions and the weather, it was mountain riding just as much as being off the trail anywhere else.
We did have 2 shovels with us, and we used both to the point where I was sure we had many many more hours of digging before I could extricate all of the sleds to ride back down the mountain. My chief concern at the time was that if we stayed and kept working on them, it would take us into the night. And given the bad weather, I did not want to get caught up on the exposed mountain at night.