One night we took the bus back to ASsp instead of ASmu. We walked from the bus stop, along the back side of Touch Down and Grand Slam, cut through the parking lot, and was at ASmu main building area in just under 5mins. I didn't think it was that bad of a walk but I don't recall they're being a sidewalk and hence having to cut through the parking lot.
Overall, all three All Stars are very close together.