You will find that everyone does it a little differently. For us, our goal is to see as much of the U.S. as possible.
We don't travel 12 months out of the year because we need to spend 2 or 3 months camped in our original northern home area for visiting kids/grandkids, plus we always spend 4 or 4.5 winter months in SW Florida. But we can travel and see a lot in the 6 months or so that we do travel.
I have heard many say that you can't live that much cheaper full timing in an RV. I think much of that depends of what your original house expenses were and what your income is. We went from adding very little to our savings account to putting about 30% - 40% away each month.
Without breaking costs down too much, because everyone is so different, I can tell you that we are averaging just under $800 per month for CG fees. When we are in our home area for part of the summer we have a large site with all hook-ups for $325 a month. We use more high end resorts in SW Florida that are within a mile or two of the beach and that really drives the average up.
The rest of our expenses are about the same. We still have Direct-TV and those charges did not change, we have a side-by-side washer/dryer so there is no expense there. We don't eat out more often so those expenses stayed the same. We pay a lot less to insure a 5th wheel and three vehicles compared to what we used to pay to insure a house and two vehicles.
We love this lifestyle and wish we could have started earlier!