We stayed at Wangaratta at the beach. Small, older, cheap. Decent pool. Clean amenities. Access to sandy protected beach by walking out back gate and across end of the golf course. Beachside walk is nice. Limited camper trailer spots. Quiet, but pub on the coroner does popular meals.
The big 4 looks nice, but water access is via a concrete staircase to a rocky bit of beach. So not so great if you actually want to swim or launch a kayak.
Horseshoe bay is a popular small beach so very crowded.
Rose Bay is backpacker heaven. Was told it is the spot to buy drugs.