Bill,
They are both WELL WORTH the trip! Add in the devilish romp that is the Dunaverty Links and you have an awesome few days of golf.
Be aware that MD is a raw, wild presentation that is still evolving. It is a stiff, but very natural test and one gets a close approximation of what early links golf might have been like. The pub and cottages are first rate and the other work on the hotels is nearly done from what I've heard recently. The Mull of Kintyre is surely one of the planet's special places and has a haunting serenity about the countryside that's hard to describe.
That Dunaverty, with its bushel of par threes(7-9?), is a gas! One and 18 are weak efforts, but the rest on the track has some sporty holes and several stunners. Plan it pal...and enjoy! IM me if you want more info.
Cheers,
Kris