We have hauled mulch without it blowing out. Just kinda take it easy. Or maybe have someone deliver a truck load of it. You could weigh a tarp down with cinder blocks too probably.I'm guessing if I went and got like a half truck bed full by the time I drove 45 minutes home it mostly have blown out if not tarped or something?
Afraid if I tarped it the d@mn tarp wouldn't stay put. Blow out and cover the windshield of someone behind me and then id have a lawsuit situation.