How long will you be there? Will you need air cond? If only for a few days, make sure water tank is full and black and grey tanks empty, and use a regular ext cord to plug in, with an adapter, or find a 30 amp extension cord. Lots of people have them and they are not too expensive, that way you will be able to use A/C. Just use a longer water hose to hook up to hose bib if you feel the water tank would not be enough. I wouldn't bother with extension sewer hoses. When grey or black tanks get full, unplug elec (and water hose, if used) and turn the motor home around, dump tanks and fill water tank and then set it up again. That is the beauty of class c's, easy to move.