the sewer thing is only mandatory if you stay some place over 30 days, it is in Oregon any way. so if you a full timing or some thing like that then get one, I think I would get the camera before I would get the sewer thing. You can go to the FAQ's on the top of this page and there are lists of things to get your RV. many are not necessary but are something people get and then sell in a yard sales. one thing you might want to invest in is a good water pressure regulator, not the cheap in line plastic ones but some thing like a home watts brand with a gauge that can be adjusted. A GOOD sewer hose, the heavy weight, not pound wise but thickness of the vinyl coating, and don't drag it across the ground, that is the number one reason sewer hoses leak prematurely. a good tool kit, a blow out plug and a winterizing kit and a water heater by pass kit the last two are for winterizing the coach, well this will get you started. you can go to a local dealer and see if they have any parts and accessory catalogs that they give out free. and spend the winter shopping for things to buy before spring.