I'm 40 miles to the north of Aberdeen, don't go into Aberdeen that often so I don't really know round there. Obviously there's the cairngorms to the west.
There are some members around although not very close, I'm not sure where exactly they are. They tend to meet further over to the west. Do you have transport?
There were some others who met around the cairngorms but they are not very active on here anymore - I think they started a Facebook group.
I recently found a path up here, maybe of use to you. Buchan and Formartine way...