Always carry a Y splitter. I now carry TWO, one brass, one plastic. Do not buy the ones in the RV department at WalMart. Those are the zinc die cast chrome plated ones, they literally rot away. Get the better ones at a home & garden store made for outside heavy duty use.
Side issue: just because you're a long term CG resident does not mean you get to use any and all of the taps for spots not currently occupied. And don't get upset when someone removes your corroded Y connector with the black tank wand left attached from their tap! BAD FORM!