If you are going from one Disney resort to another, there is no need for a cab, unless you want one to get you to the resort faster....
Disney will move your luggage. Just have everything ready to go in your room, and have Bell Services come up with the luggage rack to take your stuff. Let them know ahead of time where you will be going (What is VWL? Do you mean WLV for Wilderness, or is VWL something else?) You may need to give them your reservation confirmation for the other resort as well as your name, of course, and they will transfer the bags to the new resort, and up to your room once you check in.
If you are going from SSR to WLV, then you could take a bus over to MK, then take the boat or another bus over to Wilderness. Or you could go over to DTD and grab a bus over to Wilderness.