Wanted: One weeks Storage Peebles/Kelso area

Hello, I hope somebody may be of assistance. Each year my wife and I have a three week holiday in Scotland. During the second week we normally rent a house that would accommodate additional members of our family and park our caravan in the grounds. Next year we hope to rent a cottage in the Peebles area but the cottage we have seen is limited as to space. Do any members have knowledge of a location in that area where we may store our caravan?