I'm in the "No Seasonal Site" camp. HAHA...see what I did there? :) However, if you have to pay for storage anyways, it might make some economical sense.
My mother-in-law has a permanent camper at a CG about an hour away and, while it is nice and convenient and some of the neighbors are nice, frankly it is pretty boring to go there. Even my kids don't really want to go there very much any more. They've seen it and done it. In my MIL's case, her annual fees run about $700 and that includes electric, water, sewage, and garbage. I don't know what RV storage would cost, but that would work out to only about $60/month. The CG is open all year round, but they turn off the water once it starts freezing. They keep water on in the bath houses though. And except for the main road, they don't plow the snow in the winter. Most of the lots would be tough to get in and out of all the time because the roads are narrow with many mature trees. But others would be fairly easy. So if you could get a lot with good in/out access (would run about $3000-$5000 for empty lot at her CG), you could have that as your base camp and, if you want to travel, just go hook up and drag it out of there. 99% of the campers there are "park model" types that don't move. However, there is a nice motorhome that drives in and out on a regular basis.
So if you could get something that was accessible for a decent annual fee, it might not be a bad idea. The only downsides would be the up-front cost to buy the lot, and being committed to the annual fee until you found a buyer if you ever wanted out.
