For the easiest, quickest route,I would walk back to MK...but if you'd like to take the monorail ride, take it from CR TO TTC or to Poly. You can then get off and walk from Poly (enjoying the grounds) to TTC and grab a bus there to AK, or continue on the monorail to GF, stay on and continue on back to MK. You can get off there and just head down the ramp and over to the resort bus area. We love the monorail and usually stop at each resort and visit them, hitting the shops, lobby etc., just walking around. We like the Poly at night, Tiki torches are lit, very nice, go down to the little beach for a bit. Explore...it's a great thing to do at WDW!
Remember to take note of the trees at CR if you walk over, the lights twinkle in the trees. we prefer to think of it as Tinkerbell and Friends lighting up the way for us.
Pam