Temporary Storage
Storage anywhere except on your own (owned or rented) property is a problem. Most storage locations tend to be in 'cheap' areas, which are not noted for either their conveniance or their security. If at all possible, I'd store it at home, where I could keep an eye on it, and loading/unloading/maintenance was the easiest. Besides, I use it as a guest room
Of course, for your usage, this probably won't work (unless you buy a small property near the area you will be roaming, and even then security will likely be a problem). If it was me, I'd do the round trip in the RV, or more likely, spend the winters RVing in the south and the summers 'at home' in the north. Of course, I'm too big and too independant to subject myself to the airline industry...
I haven't tried storing at a campground, but if it was cost competitive I would be willing to try it (assuming the campground was good quality and the security seemed adequate). Fortunately, I haven't had to store my trailer anywhere except right next to my carport, where my only problem has been people trying to buy it