I'm trying to build a boat vs dire crocodile chase for my level 4 group (as a replacement for the direct fight against the dire crocodile which is given as a random encounter in the module).
I started by laying out the obstacles for the boat (like a sudden calm or reefs) and then tried to deduce the obstacles for the PCs from that (for example a Str check to hoist a sail). The problem is that I did not find enough different obstacles for the PCs (especially lacking some for the wizard/cleric type characters).
Has anyone done something like this before and would share the ideas?