We just stayed at the Swan this past weekend and the bus situation there is not great. They are using Mears buses to MK and it drops you off at the TTC, which then means you have to get on the ferry or the monorail to get to MK. It's definitely a disadvantage for that park and we ended up just Ubering to every park but the ones we could walk to. Personally, I'd stick with CSR for your trip. We've always had great bus service there and I bet right now it's just as good as it's always been since they're limiting the capacity of the resort to the 30% mentioned. Plus, it's a really centrally located resort, which makes getting to anywhere on property really easy using Disney transportation or an Uber.