Water Fill Concern - How To If No Pressure???

I assume that this will not be a "normal" thing but a situation that may come up in an emergency. In that case, you could make a short hose that connects to your normal shore water fill outlet and extend that hose to a funnel that is held above the level of your water tank. Since most water tanks are low, this hose/funnel combination does not have to be very high. Once this is hooked up, you just dump water in the funnel and the gravity siphon effect will take care of the rest. Rather than a bucket, I am sure that you can rig up some kind of a 5 gallon water container that would hook up to a hose and make the fill process easier.