It is by far not 2 miles. We stayed at SSR this year rented a car from Avis which is at the Hilton - yes other hotels are further down. The walk to SSR congress park bus stop from the bridge by once upon a toy is 10 minutes walking very slow I would put 5-7 for average walking. The congress park bus stop is second to last on the buses going to the parks so the internal bus ride will be maybe 3 minutes in the resort and the parks are all a similar bus ride of about 10 min. or less for EPCOT or HS. But as above the shuttle will likely be a better option unless the schedule is far apart.