My wife and I are heading out on June 20 for 3 or 4 months in our 26ft class C on an E-450 chassis no tow.. So let's "estimate" per day costs. Some days will be more some less. No breakdowns. $80 for gas. We do 175 to 225 miles per day 8 mpg. $45 per day for a campsite. $25 per day for food. Looks like $150 per day. If we are taking a few days off..... $45 for a campsite and 25 for food. Our food not restaurant bought...... This is the number I'm using right now, but gas is going through the roof, so is food. So who knows. When I get back in September I'll post the real numbers. Should be interesting.