I’d have to say as often as not, if I was staying at WL and eating breakfast at 1900 Park Fare, we’d drive over. I realize this isn’t always an option for many of us because you fly in and don’t need to rent a car.
In the evening however, especially as we’ve eaten dinner at Narcoossee’s before going to a late night in the MK, we do the two boat thing.
The first leg to the MK, on one of the big boats shouldn’t be much of a problem in any weather, but you don’t want to be in a Navigator with the winds much over 20 MPH. In fact, if it gets too stormy, Disney Transport will suspend operations for watercraft. But whatever, the leg going from MK to GF is very fast. The return is a bit slower because the boat continues on to the Poly before returning to the GF and sometimes it’s a little faster taking the monorail back to MK.