Your first time in a camper? Ah, you may be in for a surprise. Here's the advice: Be very water spare. Your waste tanks are directly related to your water use: What comes out of the outlet goes down to the tank. Further, your water heater tank is itsy-bitsy, teeny-weeney compared to your home wather heater, so navy showers. Don't let the water run in any sink while you're not actually using putting that water to work. So, for example, wet your hands, turn off the water, soap up your hands, turn it back on and rinse quickly. And wet your toothbrush, turn off the water; brush your teeth, then turn the water back on for a quick rinse. THe less you use, the longer your tanks will hold out.
:)
Lynn