I would have to agree with using the buses. I have waited over 30 minutes for a boat at FW, but almost never wait more than 5 minutes for an internal bus from the Settlement to the Outpost and then rarely more than 10 for a bus on to where ever I am going. Conceivably just the boat portion could take 45 minutes to an hour while the buses would most likely have you all the way to DHS in that same hour. If there happens to be a taxi at the Outpost that would be even faster, but I refuse to waste money by using cabs at WDW when their transportation system is so great, but that's just me.
I love riding the boats, and usually they are the fastest way to get somewhere, but not in this case.