Hi, when you arrive I would recommend that you join the Arran Angling Association as an Associate member. This will cost the princely sum of £35 and covers the following rivers, North Sannox, South Sannox, Kilmory, Sliddery, Monamore, Benlister, Cloy, Ashdale, Chalmadale as well as Loch Garbard which is stocked with rainbows as well as as indigenous brownies. You can join at, Bay News, Whiting Bay, Sliddery Supplies, Sliddery, Lamlash Post Office or Seal Shore Campsite, Kildonan. A boat is also available on Loch Garbard at £5 per day also from Seal Shore Campsite. Day permits are also available for all these waters but at £20 per day it makes financial sense to become a member. The fishing in all the rivers varies in quality but all need a decent amount of water and fish best after a spate. However even when the waters are low a little exploration will lead you to deep pools where the fish lay up.
Other private waters available by day permit are Machrie Water (£55 per day - 1/2 day £35) available from the Bailiffs cottage which is just over the Machrie bridge on the right heading north. Can't miss it, there's no other property nearby.
Iorsa Water (river + loch) is largely inaccessible for visitors, catering mainly for prebooked parties of four rods or more and outrageously expensive. However folks are pretty accommodating here and it's worth knocking on the door of Dougarie Lodge and enquiring for a day ticket. If business is slow you never know your luck!
I'd be delighted to have a pint with you when you visit!
Editorial. Correction below .....
The Black Water River and 'Loch Cnoc an Loch' in the hills behind Blackwaterfoot are both leased by the Blackwaterfoot Angling Association and offer private fishing to their members only.