You need to allow at least an hour (or a little more) to get from one resort to another by Disney transportation. You must take transportation to the nearest park (or DTD) then transfer to another transportation to the second resort.
OK, if you are going to a MK area resort, that's easy. You take the monorail, which runs every few minutes. If you are going elsewhere, it will be 2 busses, which are scheduled every 20 minutes...and you might have to walk from one area to another to catch the second bus.
For example, from CBR to Spoodles (an EPCOT area resort), you will take a bus to EPCOT. You can then walk thru EPCOT to the back exit and take a boat or walk to Boardwalk. If you have planned your days efficiently, you'll do EPCOT that day, so will only have to go to Boardwalk. If you are going "home" after the parks close, you will take a bus to DTD, and transfer to another bus back to your resort. Garfden Grill is inside EPCOT, so you need only one bus and a walk to THe Land pavillion.
O'hana, you take a but to MK and a monorail to Polynesian--that's quick and easy.