Lookingh for contacts - Northern Cape

[Wingman]

I am planning to fly down December to do a 7 day trip on the Orange River, starting close to Noordoewer. I am looking for any tips, contacts, etc to assist in the planning. I would like to find some temporary hangar space or at least a safe storage for my Savannah for the 7 days at any of the following fields:
Kakamas
Augrabies
Pofadder
Aggenys
Noordoewer
Springbok

Hope someone could assist?