>A car hood will work, I used one from a Honda Civic.
Car hoods work quite well. They slide easily. But they dent and wear out
pretty fast on rough, stony ground.
The one I used was in the forest and on grass.
FWIW up at Lake Itasca State Park (MN) they had a display they said
there were hundreds of feet (700 comes to mind) of glacial leavings
between the surface and the bedrock. Lot's of rocks...
Rob
becida AT comcast.net
Western Washington State, USA