Highland Park and Scapa distilleries are on the island of Orkney. A taxi from Stromness should take less than 30 minutes. Our cruise (on Seabourn Quest) stopped at Kirkwall, which is only slightly closer to the two distilleries. We visited both.
Fletcher, we trust your travel advice, but your whisky knowledge is a tad lacking. Scotch whisky is a proper term for whisky made in Scotland. Scotch whisky can be a single malt, a blended malt, a blended whisky, or a single grain whisky. The photo below shows a Single Malt Scotch Whisky.