In reply to pasbury:
Isle of Arran has everything but has a lot of midges June onwards. Scotland in miniature its called and deservedly so.
New subsidised tariffs for the ferry mean you get a return for your car at £27 odd quid (half the previous price) for a one hour crossing.
The ridge walking is some of the best in Scotland leaving out Skye. Lots of scrabbling along narrow ridges. Cir Mhor (google images) is an amazing peak. Crystal clear granite pools for swimming in Glen Sannox/Rosa.
For the family a short ferry to the Buddhist colony on Holy Isle is an experience with a walk up the islands easy access hill.
Great food, malts and cracking beach beer garden at the ferry inn lamlash. Lots for kids around Brodick including the castle and grounds. Brodick has many shops, supermarket, etc. You can take the kids fishing on the boats at lamlash. Many low level prepared walking routes.
Goat fell the islands highest peak is easily accessible and hugely popular with the tourist. The coastal panorama is without doubt one of the most outstanding in Scotland.
Accommodation camping at Glen Rosa is very basic but you can have a camp fire. Other campsites round the Island are much better catered for. Bunkhouse at Corrie croft has family rooms and various B & Bs self catering cottages. Auchrannie is a bit posh but the top end of the scale is the Kilmichael house hotel. Served by butlers and even the gardeners stop working and bow when you walk by. Flamin embarrassing it is and makes you walk by them very quickly.
If you haven't been I would advise you to not bypass. Google the place and have a look.