I have fished on the Tummel a few times mate. I am on a lower beat and its pretty easy wading.
I always wear my fly vest with inbuilt flotation thingy... I do swim like a brick!
In fairness the Dee's grilse run is being affected by storm Franks battering a few years ago, according to the ghillies last week.
There were loads of parr, which gives some encouragement for the future.
The west coast rivers I fish...Annan, Cree, Bladnoch, Lochy have been awful for the last few seasons.
The Wye is a disgrace.