We've covered Dunnottar before in your previous thread. If you bus there and walk back then the steep climb up from Stonehaven Harbour is a steep descent.
The bus fare is £9.80 single, so buy a £10.20 Aberdeen Commuter Day Rider ticket on the bus. Or if you are extending afterwards to Arbroath on the X7, which is a very good idea, buy an East Scotland Day Rider for £12.20.
That latter ticket is unlimited travel as far as Glasgow and Edinburgh via St Andrews and the Fife Coast.
For Footdee- if you are there before 21 September you could use the Aberdeen Adventurer HoHo bus. Otherwise bus #13 takes you down there every 20 minutes (30 minutes in the evening) until 11pm.
For Day 3 so many possibles- the bus 201 down Royal Deeside to Braemar.
or the very good bus services to Peterhead or Fraserburgh.
In all those cases buy a Bluebird Day Rider for £20.20. It also covers the X7 as far as Montrose, so buy that if you are going to Dunnottar in the morning, then the other side of Aberdeen in the afternoon. It actually extends all the way to Inverness and Culloden, but that is a very long trip.
Another great option is the twice daily Ember Bus to Dundee via Royal Deeside and Glenshee. £10.10 each way.
There is an hourly direct Ember Bus from Dundee to Aberdeen for £8.50 each way.
