When in Wilmington check out the downtown waterfront area where the Coast Guard cutter is docked. Kind of like a baby Charleston. Battleship NC is just across the river with river taxi available for that ( or you can drive to it in a few minutes ). Since you will only be going as far as MB the next day consider the route down 421 to Fort Fisher. You will pass Britts doughnuts Ymmm!!, the NC Aquarium, Fort Fisher historic site, and end up at the FF ferry. A 45 minute ride gets you to Southport, a nice little town with history. From there take 211 to 17South and you will be 1/2 way to MB. Might want to check but I think the newer ferries can handle about any rig you might have.