Lol Sandison's book is a piece of work all right but loads of the info is well out of date. Balgownie sports has been closed for years as far as I know. I wouldn't bother with Corby Loch, its rock hard unless you are well in the know.
The best of The Don trout fishing is over but if you like fishing rivers for trout its still worth a day. If you are going for this option send me a pm and I will try and keep you right.
Haddo, is boat and tube and my favourite fishery in the area. Beautiful place and Mike is an excellent guy. It's no longer just a rainbow trout fishery, it's now stocked with quality brown trout which have been taking dry's freely recently

There are still some rainbows to be caught including some cracking grown on fish but no recent stockings.
Lochter is another fishery I like and only a few miles from Haddo. Its bank only. You could easily fish both of them in a day.
Aenoon's suggestion is well worth considering, I hear its hoaching with fish.