Hey there!
We just bought a trailer to haul our son's quarter midget and we are storing it in Concord on HWY 29. $25/month! You can access it anytime, day or night. We can't have it at our house due to HOA restrictions.
They have a TON of RV's and other trailers there, but also lots of available space. I assume the price is $25/month for any item that needs to be stored. My husband found the place. I'll ask him what the name of the place is and post when I find out.
Hope this helps,
Nicole