XGolfman, you made the right choice with river vests, Fernhill's are the best quality nylon version of the river vest. The Pioneer, Trophy XL or even the Complete Angler ones don't even come close in quality. The construction and material is better with the Fernhill vests. The back section on Ferhill's have a double layer of material, where most other river vests only have a single layer of material.
I agree that river vests are not designed for comfort, especially when they are loaded full of stuff
The only suggestion I have is to either lighten up your vest or get it custom modified with some padding sewn into the shoulder area.
FA, what's wrong with my avatar
Don't we need more H2O in our rivers right now?