In Florida there are usually municipal marinas that offer free or modest charge pumpouts. You're not going to do it where you're tied up, but there are a significant percentage of marinas without in slip pumpout also.
The other considerations for seeking private homes for dockage is a lack of marina space. In spite of the Canadians staying home this winter, winter slippage is very scarce this year. Lots of people buying boats or choosing to stay out of the NE this year. The yacht club I've stayed at the last 3 winters has no season dockage this year. Everything is annual leases. I ended up buying a slip at the yacht club to guarantee I had dockage. I imagine it's similar on the East coast.
Ted