We hit Edinburgh, Inverness, Portree (Isle of Skye), Oban, Stranrarer, and Glasgow in a week. All we did was buy a copy of Lonely Planet Scotland, take coaches to the places we wanted to see, and than planned day trips from those locations. If that failed, we took the first coach that showed up and went that way instead. I Try to avoid hotels and instead look at guesthouses and B&B's. Most tourist offices will have a listing of local accomodations.

It's a beautiful country and so easy to miss so much. Best of luck with the trip planning.