That's really a tough call. Personally though, I like to keep my campers on my own property, under my own control, and accessible whenever I want. Even the most secure place, even under cover, is still at the control of someone else.
The house we currently own was purposely purchased for 2 reasons. 1) It has space for a wood-working shop. 2) Local ordinances had no restrictions on RV parking, or living in them either, provided the "family" is "single dwelling". But, there is no building to park the campers in. So they have all been outside. And yes, I've covered and then I didn't cover. And now at the age, time in life, and size of camper, NOT covering is the option I do now. I'd rather not cover on my own property than be under roof at someone else's.
For a short while, we parked one of our previous TT on the in-laws farm near Lafayette, Indiana while we searched for a new house, because the city of Carmel, Indiana told me I had to move my trailer (after parking one there for 16 years). We considered storage facilities, but also heard horror stories about RV break-ins and theft. The in-laws let us park it there while we transitioned to our current house. I hated having it there, even though I knew it was in good hands. It went through one very hard winter there when Indiana temps got down to -20 F (without the wind), and the vinyl floor and shower surround cracked there. Once we had the new house, the very next day after we got the keys, we pulled the trailer home. I've never regretted having the trailer in my own driveway under my own control, even when it wasn't covered.
But, that's just me.
