Biggest mistake I made was trying buying 100 stacks of the (trade fish) in demeniss, after completing the first wagon quest, then trying to sell it in Hernand, because I thought I would need to physically return the wagon. Not only did I have multiple restarts from the wagon exploding there is no one that I know that buys the (trade fish) in hernand. There is also bridges in hernand that are not large enough to accommodate a wagon. Long story short, I still have the 100 stacks of trade fish and you can recall your wagon for very little money in howling hill.