Electric should only vary with amperage. Newell use a 240 volt 50 amp circuit (3 blades 1 round pin). Many older parks still only have 120 volt 30 amp (2 blades, angled and 1 round pin). There could be a few state parks with only 120 volt 15 or 20 amp (looks like a standard household grounded plug). With the right adapters, you can plug into any of these but you will be severely limited in how many items you can use simultaneously (the older the coach the easier this will be). I always travel with 50 amp to 30 amp and 30 amp to 15/20 amp adapters just in case.
Water faucets should be the same other than a few state parks that don't have water hookups that are meant to be used individually so they don't have threads on the faucets. Sewer hookups will generally only vary in whether the receptacle is threaded on the inside or smooth. Some states require a threaded connection or a donut seal.