[kcdusk]

I'd say preparing the barge and tugs for travel down this hostile river environment is half the fun of the module!

What kind of ideas do the players have? Can they resource them in terms of finding the items, transporting them back, building modifications, holding back local scavengers, bartering for hard to get items, and any other timing factors (is the river rising or falling? is there an enemy force on the way that means the PCs will need to prioritise what 3 jobs get done ...).