We have recently upgraded to a larger HTT and will no longer be able to keep it in our driveway. Up to now, I've been paying nothing for parking our pup in the driveway for the summer, and at my mom's country place for the winter.
I have found a spot for what I think is a fairly reasonable $3/linear foot ($60 a month for a 20ft TT). This facility is fairly rural, about 15-20 minutes from my house. I would have liked to find something a bit closer in, but all the urban lots I checked had waiting lists.
The facility has fenced secured access with cameras. There is power and water access on site (not at the TT parking spot though).
At some point I may decide that adding $60/month to my mortgage may make it a better deal to just move to a house with a decent side yard for parking. Kids are grown and flying the coop (well at least to college for now), I might even consider downsizing the home to keep them out.
I am curious about what others pay in other areas of the continent? What is included in your costs and how convenient is your location?