That sounds pretty suspicious to me, flat bed dodge, and nothing marked. I'd place a bet that it's illegal firewood cutting. Those kind of characters need stopped, They are the reason we are losing access to our State and Federal lands by means of Gated roads. Could they drive to pretty much everything and load it easy enough without having to pack it very far? Thats another tale tale sighn, most of the illegal firewood guys aren't going to work very hard for it, they usually take whatever they can get to the easiest