Not convinced, sorry Con. The classic Swampie scat is more elongated and contains some coarser material than these do. Most local macropods can produce scats that look like each other's, so they might be from a Swampie, but they looks much more like standard RNW or EGK scats.
Don No worries. It was worth a try! My problem with getting a record is that the Swampie (I think there is only one) in this location is extra skittery. Instead of bolting and then stopping for a photo op it keeps right on going.