For the GF - if MK is open until 9pm that night I would take the bus to MK as it will be running until after 10pm and then catch the monorail to the GF. The bus to MK will take about 20-23 minutes then it will take you another 8-9 minutes to walk to monorail (depending on how fast you walk) ... then wait for the next monorail (which at that time could be 10 minutes - perhaps) then go around to the GF which is probably about 15 minutes. These are all estimates depending on crowds. You will more than likely have to take a bus from GF to DTD and then to AKL unless it is a night when MK is open until midnight.
As far as Yacht Club, if you have the time you can go a little early and get into Epcot before it closes at 9pm. Walk through Epcot and then either take the boat or walk to YC. Bus to Epcot is about 15 minutes (maybe less) then it would depend on how fast you walked. We found it was quicker to walk than take the boat but it is sometimes fun to take the boat. At that time of night, though, the line to get on the boat can be long.
Contemporary, if MK is open until 9pm you should be okay to catch a bus and then you can either walk from MK or you can take the monorail. Contemporary is the first stop so it won't take long. That said, if you are good walkers, you will get to the Contemporary quicker to walk than ride the monorail. But the ride on the monorail is wonderful and fun. Here again, unless it is a night MK is open late you will need to go to DTD and then to AKL.
Hope that helps.