There is a boat that runs the circuit of Fort Wilderness, Wilderness Lodge and Contemporary Resort. Thus you can take that boat to CR for your reservation. Other option is take boat to MK and walk over to CR (5 minutes) or take monorail. As to getting to GF or Poly quickest is to take bus from WL to TTC; from there you can walk to Poly or take monorail (walking is faster) and monorail to GF. Other option is boat to MK and then boat or rmonorail to Poly or GF.