Hi Rob,
All the info you seek is on my site at
http://aghilliestale.com described there is a typical highland situation and explains in detail...
why how and when sea trout and salmon run.
Where when and why they lye up in the river system.
Buy a local tide table book ..cost no more than a quid from boat chandler suppliers or check web for tide tables.
A cast or two in the estuaries is always a good bet too [permit required]
Any way Please pay a visit to site read my articles and if you require any more info please just ask !
The lads on here know their stuff as well as I do.
kINDEST REGARDS
JOHN