The bus to MK is the best method for all three. Then you have several choices. For the Polynesian and 'Ohana you can either hop on the monorail and ride that to the Polynesian. It will be the third stop. Or you can take the small ferry boat from MK to the Polynesian. It stops at GF then Polynesian. It is located over below the monorail station, to the left of the bus stops.
For Chef Mickeys I usually just walk to the Contemporary from the buses. It's a very nice path and takes about 8 minutes to walk. You will have to follow the crowd that is heading to MK main entrance but then hang a right at the path and head over to CR. You can not just cross the street...the bus drivers will take a nutty on you!!! Or you can walk over to the monorail station and hop on for the short ride to CR. I think this is the slowest way to get there but others like it. I just think that by the time you walk to the monorail, wait in line, then ride over to CR...you could walk the path and be there with almost the same amount of walking. But it's up to each person.
For Wilderness Lodge and WCC you can either take the ferry boat from MK to WL or you can go over to the CR and take a ferry from there. 6 of one, 1/2 doz of another. Since you will be right there, at the boat dock in MK it most likely makes more sense to take the MK ferry boat.
If you leave about an hour for any of these methods you will be fine. We try to look at the 'getting there' as part of the whole experience. That way it doesn't seem like such a waste of time...just part of the adventure.