No issues. Rough gravel drive. On a slight incline, and then a small bump into the shop.

But I staged everything reverse stack to how I wanted it on the truck. Made 4 piles 6' betweeen, 2 bunks high each side. Would roll in and out. Finished timber went to the end of the drive to await truck. Had a few smaller piles way down the drive. Never an issue. Except in snow. As to be expected.

Big bouncy tires was key. Just enough pressure to be able to roll over the bi gravel with the weight. Too high and you get stuck. Too low and you work too hat to move 4 sticks 30'.

Look for some old MTB wheels. Should have a 9 or 10mm skewer . Pull the existing skewer and run some rod all the way through. Making the dropout would probably be the toughest part.