These hills lie on a separate high plateau to the south and east of Braemar. There are many access points separated by long road journeys but which all give access to the centre of the plateau. Long walks taking in many summits can be generated and it is satisfying when you find an unusual route to a munro, for example you can climb Lochnagar by starting from glen Callater. Like the northern plateau which is easily visible from here there are many paths, land rover tracks, and rivers on the high plateau and when mist descends good navigation will be needed as suddenly you will come to a steep cliff edge plunging into the glens below. Generally the going is easy and grassy in summer and again a bicycle will help the access along the glen tracks.
Mount Keen is an outlier to the east and is not quite so boring as made out. It is not worth taking a bicycle to the top of Mount Keen - proven.