New to fiver's but have 25 yrs. with a Truck Camper

WPRer I just made the same switch 1 1/2 years ago. We went from TC to 5er. I also hunt and fish ECT not as cold as you but I have found that not much changes between the two. Yes you will use a little more of everything. How much will depend on how big of a 5er you get. The extra fuel or battery charging is well worth the comfort. As always Old-Biscuit is spot on with his advice. If you were a experienced camper with your TC you will have a very small learning curve. Welcome to the forum!!!