It's very important - - if you run out!
If you wish to do a test, take a sheet of your favorite brand and put it in a jar of water. Shake and see how long it takes to break apart. If it doesn't break apart at all, don't use it. Also, make sure you use lots of water when flushing and dumping the black tank to keep from building a 'pyramid of poo and paper' that can reduce black tank functions.
Running the generator for the A/C is common practice, there's even some folks that suggest the fuel used to run the generator is saved by turning off the dash air, but we use both in hot weather.
The only Electrical Management System I would buy is one by Progressive Industries. Progressive Industries RV Surge and Electrical Protection industry lea
It's well made AND
has a lifetime warranty, no other has that kind of support. An EMS does more than just protect against surges in electricity, it also checks and makes sure the pedestal is wired correctly and supplying energy within safe parameters. If the voltage drops or changes, it disconnects, delays, then reconnects when power is O.K. It protects you against issues commonly found in many campgrounds. Remember, a surge protector actually sacrifices itself when it's doing it's job, so why not start with one that will always be repaired or replaced?