[wiredgeorge]

I camped in Utopia TX a couple weeks ago and hook up my sewer hose. Left the galley gray tank open but the main gray (bath sink and shower) and black closed. Main gray was for washing things out while dumping the black. We had fire ants crawl up through the slinky stinky through the hose and ended up looking for something to eat in our kitchen drain. Guess the sewer that we were using hadn't been used in awhile. Suggest you at least run a tank or so through the sewer system for this reason; after that, likely OK as you probably drowned anyone living in the sewer.