I just checked online and came up with Freedom RV Storage, their email address is, firstname.lastname@example.org
and phone number is 303-427-8474.
They are located just north of Denver off of I-76. If you check with them they will either have a storage bay or can hopefully help you with finding one with another RV storage place.
Good luck.....by the way, your english is much, much better than the few words of german i remember from my army days stationed in Baumholder.