Hi Doc
I've tried DPM, Realtree and Flecktan and combinations of all three.
I now use an assortment of fadded denium (green) and an old lodden green jacket and it works well.
Camoflage, if it gives an advantage is only very small.
A face viel and gloves probably will be of more advantage that camo especialy in conifer plantations where you will be shooting over short distances, or should be.
Fieldcraft is the secret.
Happy hunting, Pothunter.