I fulltime. I think there are a few things to know first. Are you by yourself ? Do you take showers in the RV or in the CG ? Do you pay for electricity separately ?
Many people who rent by the month and pay separately for electric will turn off the water heater to save money, cycling it on when needed. Especially in winter.
I just got to Southern California and have seen several signs advertising propane for $1.59/gallon which is much cheaper then I paid over the winter in Phoenix. So it might be cost effective to flip the switch on your water heater from heating with electricity to propane.
In general, I like to leave mine 'on'. One word of advice - if you have a Suburban water heater, check the anode every 6 months. They are easy and cheap to replace. You can get them from Amazon at a good price.
* The new ones don't have a pilot light.
Tim