There are small launches that trianglulate between the WL, CR, & FW all day long. I think they start around 7 AM or so, I know they were running early enough to take it from WL to Chef Mickey's at the CR for breakfast with the gang.
The boats have a classic design and are open sided. You are out of the sun because they are covered with colorful canvas canopies.
The boats to MK are much larger and have a closed in cabin in the middle. They can also be differentiated because one flys a blue flag & the other flys a green flag - though I don't remember which is which.
An added bonus is that at busy times of day, they seem to dedicate boats to give point to point service between two of the three resorts they serve. The boats are a convienient way to get to and from the Hoop Dee Do.