Re: rivers in NB....guide only???
Non-residents must have a certified guide to fish any and all New Brunswick rivers. Class I guides can guide 3 non-residents at a time. And they charge for it. Class II guides can guide a non-resident, but are not allowed to charge. I am not aware of any exemptions, and I fish there from May to September.
By the way, fishing methods are vastly different between the months of May and June. If you plan on fishing in May, which is largely done from small boats, you better bring your woolies.
I've also sent you a PM.