We do almost all of our roaming/sightseeing between May and October. Each year we look ahead and kind of map out some destinations that we haven't been to. Last year we visited numerous states out west, took a cruise to Alaska, and then came back toward the central part of the U.S. prior to winter.
When we started two of our requirements were (1) securing a site close to our old home area where we could visit with kids/grandkids and take care of doctor's visits, etc. (2) finding a winter spot for 4 - 5 months of semi stationary use.
We found a 12 months CG in Illinois on a river, which is in our old home area. If you stay for a minimum of 3 months, that spot is yours. When you travel they don't charge you and rent it out to others, but as long as you use it 3 months every year, it is yours when you want it. The cost is $10.48 per day, or $325.00 a month and that includes water/electric.
Our spots in Florida stay pretty much the same. Generally we spend 3 - 4 months in the Fort Myers or Fort Myers Beach area at nicer RV resorts. These CG fees are much more per month but we wanted warm temps and we wanted to be within a couple of miles of the gulf beaches.
By having two "home bases" that we spend 3 - 5 months at, it enabled us to save a little extra on site fees. Plus we don't like to always drive a 1-ton truck around for everything, so we keep a Jeep Wrangler in Florida and a SUV in our Illinois home location.