Yes, cabs are always easiest resort to resort. The WDW busses do not do any resort to resort routes. I always budget a few cab rides to resort ADR's. It is still much cheaper than renting a car, and far more convenient.
I save in a special envelope over the months leading up to the trip and have my cab fares and tips all ready. This way it is painless for me.
Enjoy
Ok, thanks! I've never had a problem spending $$$ on cabs; I think the extra expenditure is worth it considering that it's far less stressful and time consuming than waiting for a bus and then hoping you get to the resort on time.