Congraulations on your first DW trip! Am I correct to assume you are a
DVC member? (I'm not).
Disney is addictive and it's hard to stay away. Even after a full week there I always feel I can stay another day or 2 for a few more things. BUT, if you're a DVC member you will be coming back again and again so you don't have to feel as compelled to see and do everything in this one trip.
That being said...yes, you really don't count your travel days for much...depending uponyour flight schedules you can use these days to check out the villas, relax - go to Downtown Disney for some shopping (if you're staing at SSR you're right there.)
6-8 days is a good amount of time. You probably want at least one day for each of the 4 parks. Animal Kingdom usually closes the earlier (around 5pm) so the day you do AK you can plan to go to another park in the evening - like EPCOT for dinner and Illumninations. (that's if you have the park hooper ticket). After the 4 park days - you may want to have another day to go back to your favorite park(s). Or you may want a "resort day" to hang around the pool and check out some of the other things around Disney or go to a water park.
I would say 5-6 full days plus your travel days will be a good start for a first timer. Just a few things to remember...
-You most likely won't be able to see and do everything, but that's OK - that's what return trips are for.
-Before you go, read up on the attractions and shows of the various parks and make a list of those you DEFINATELY want to see. It will help give you focus when you hit the parks.
-Make some advanced dinner reservations for those restaurants you really want to go to. You can make reservations starting at 180 days before you arrive.
And most of all - HAVE FUN...everyone has their own preferences when it comes to travel so make sure you do Disney your way.
Enjoy!