Right out of school, I got my start in the wood business in the swamps of Eastern North Carolina. For the most part, you are running on a root mat floating on water. The mat may be 3 feet thick, but once you break through there is nothing but water below. I've seen more than one tractor almost lost. The tractor of choice at the time was a 240 Timberjack either running 44s or dual 26s. It was one of the lightest weight machines on the market. We also ran a couple of FMC tracked crews. Maintenance on those tracked skidders was a nightmare when they were constantly running in water. The company that I worked for also had a 170 Franklin built to log a tract up on the Roanoke River. It was running dual 66s. I wish I could find a picture of it now. It was a sight to behold.
Wudman