I saw a transportation you tube video about the fact that MK is a long process to get into when you drive/rent a car i.e. a mile away from the entrance etc... so I saw that there was a boat from Fort Wilderness to the Contemporary and from the Contemporary we could grab the monorail to MK. I haven't been to Disney in many many years so basically I was wondering for those that rent cars for the trip do you ever find a need to use the buses, boats etc... or do you just drive yourself to each park?
I'm thinking you didn't know that there is also a boat from FtW directly to MK. There's a separate boat to CR & Wilderness Lodge. So there's no need to take a boat to CR; just get on the boat to MK at the FtW dock --unless you're leaving FtW before the boat to MK starts running. The boat to CR starts running earlier in the morning. But as I said previously, it's a long ride from CR to MK on the monorail, as it goes the long way around the loop and makes 3 stops before getting to MK. It would be faster to take the boat to CR and just walk to MK, along the wide path that runs between the two.
So when you referred to the boat to MK, you apparently meant the Ferryboat from TTC (the MK parking lot.) There is also an express monorail from TTC to MK. Yes, it can take a while to get from your car in the MK lot to the park. In addition to the ferryboat or monorail, you may also have to wait for the parking lot tram, depending on how far out you get parked. And also, you can't drive in a straight line from FtW to the MK parking lot; you have to make a big circle past Epcot.
FYI, in case you didn't know, you will need to take a bus from your cabin to the boat dock or bus depot. The boat dock (Settlement) and bus depot (Outpost) are at opposite ends of the campground. Almost all of the cabins are closer to the Outpost; you might be close enough to walk comfortably to the bus depot, but the walk to the boat dock would be about a mile. (That is, unless you luck into one of the very few "VIP" cabins near the Settlement; I'm not even sure whether those cabins still exist and are rented to Guests.) The Outpost has buses to Epcot, AK, DHS, & Disney Springs, but no buses to MK. The Settlement has boats to MK, CR, and WL, as well as a bus to WL.
To sum up, yes, it would usually be faster to drive to any of the parks except MK, but taking the bus to the Settlement & the boat to MK might be faster than driving.