Fuel & 'lodging' costs are the ones that are different than what we had before hitting the road.
Fuel.......about the only way to 'control' that cost is to stay parked longer.
We hit the road to travel and move frequently. So we travel only 250 miles and then plan our excursions by making 'loop road trips'
Campground costs.
We purchased a membership with Coast To Coast (C2C) & Resort Parks International (RPI) (BUY RESALE>>>>NEVER RETAIL!!!) Allows us to stay up to 2 weeks at each affiliate CG for $10/15 night. Some restrictions.
We also have Passport America. It cost $44/yr and you get a 50% discount of nightly fees. LOTS of restrictions...when/how long you can use it. Use it twice and you are even.
We stay at Corps of Engineer (COE) CG's (reasonable fees), fairgrounds/city parks and some boondocking.
We average roughly $400/450 month on 'lodging'
And we are debt free.........that is the greatest cost controller.