Well.... actually ..... yes ..... get a pump!
Most of our camping is at State Parks that has electric sites only. Water fill-up is at a specific spots, unless you are lucky enough to get near a spigot to run a hose, fill the tank and then disconnect.
Planning campsites within 200 feet of water spigots became a real pain after doing it for years and years. One day, I got smart and purchased a 35 gallon water tank from TSC (Tractor Supply Company) and we've been able to transport water at will now, without having to move the trailer or fill up only when entering the park.
But then, there was the problem that my "gravity fill port" on my previous TT was actually higher than the be bed of my pick-up truck and ... face it ... water does not run uphill. Thus! The pump!
Filling the camper with pump:
The pump is a 120 volt, AC purchased from Lowe's. I have a 400 watt inverter I keep in the truck all the time. The inverter can run the water pump with no problems, so we have the ability to transfer water from anywhere, to anywhere we are camped. It also allows us to carry extra water, and sometimes we would fill the water tank in the truck just so we would have water for showering or hosing down after playing in muddy creeks and salt water. A garden hose sprayer on the end of the hose works wonders.
We now have the ability to choose any campsite, regardless of how far we are from a water source, because we can alway fill up at the source and cart it in. It was one of the best things we purchased.
FYI, tank was a little over $100, and the pump was near $100 also. We've had the tank and pump for about 5 years now, and it's been worth every penny, over and over and over again.
Something to think about? Get a pump!
I now have a Montana High Country Fifth Wheel. It does not have a gravity fill port at all. I still use the transfer pump and it pumps the water just fine into my fresh water tank in the 5er.
