Honeymoon in Scotland, trip suggestions

[cessna152towser]

but would flying be more expedient? Here in the states it is a little hard to find flights within the UK to the smaller airports.

Flying is not cheap as the flights to the islands tend to use smaller planes with a more personal service, but can be cost effective if you want to see as much as possible in the time available.
When I was based in Glasgow I often had to visit Campbeltown on the Kintyre peninsula on business and my employers insisted I travel by air as it was only a 75 mile, 20 minute flight each way and I could do a full working day and be home the same evening. The alternatives were a 145 mile drive on circuitous twisted roads or two car ferries via the Isle of Arran with overnight hotel stays needed to complete the work.
There are flights daily from Glasgow to the islands of Tiree, Barra, Lewis and Harris, Orkney and Shetland, and twice daily to Islay, and from Oban Airport to Coll. On a clear day you get some magnificent views of the west coast from the air. There are also internal flights over the Scottish mainland from Glasgow and Edinburgh which would take you to Aberdeen, Inverness or Wick.
Information on some of Scotland's smaller airports can be found here:- http://www.hial.co.uk/