I need dirt. Lots of it. and gravel. I think I would need like 3-4 pickup loads of dirt, and about 1 load of gravel. Home depot is way expesive- the direct from mfg seems like the "logical" idea. Is it better to forgo the pickup bed, and use my trailer? I have side pocket stakes and plywood I can use to make a box. This would allow me 8000lbs of dirt. Q1: How much does gravel/dirt weigh by volume? aka, how much would 1 pickup load weigh? Q2: Would it be unsafe to convert my trailer for such use? I dont know how well the wood steaks would like the abuse of several thousand pounds of force pushing it through the side..