We have stayed at WL twice and we always took whichever boat came first, CR or MK, then walk to MK or monorail to other resort. Nice perk of staying at WL is the boat to MK and CR.
Keep in mind that in the evening, the boat takes the long way around - WL -> FtW -> CR. So that boat trip might take significantly longer than the one to MK.
For what it's worth, the transfer at the MK to either a boat or monorail to the Poly is pretty easy. The transfer from a boat to the monorail at the CR is a bit of a pain.