I'd say "it depends".
When you leave your site and drive, you get to the MK parking lot and have your choice of the ferry, monorail, or bus (I suppose).
When you leave your site, you may walk to the Fort marina to catch the boat or catch an internal bus (how long is the bus wait? depends). How long will you have to wait for the boat? (it depends). One may be there sitting waiting for you - then again it may be a few minutes until it shows up.
Bottom line for us is, boat to MK, drive to the other parks.
Bama ED
PS-if rum and coke is involved, I may just ride the boat loop twice before I get out at the FW dock. ;-)