You can park for free at the parks or use Disney Transportation (Buses and Boats) to get to the parks. Disney Transportation is free as well. Valet Parking is free at BCV, BWV and VWL. There is no valet parking at SSR (as far as I have heard).
I find the parking at BCV very convenient and a relatively short hike to any of the rooms. The walk is longer at both BWV and VWL, from the lot to your room.
Haven't been to the SSR yet, but from the plans I've seen, the parking is very similar to OKW, located just outside your unit.
So, as far as parking is concerned, you are looking good for both!
When you are staying at BCV, you will be so close to Epcot you can literally walk to the gate in about 5-minutes. No worry about parking when you walk.