The "Northwoods Sporting Journal" is the largest sporting magazine of Maine. It usually has many guides/sporting camps advertised:
https://www.sportingjournal.com/The owner/editor,V. Paul Reynolds, hosts a Sunday night one-hour (7 pm EST) radio show called "The Maine Outdoors" on WVOM (101.3 and 103.9 FM). Very laid back, relaxing, old-school format.
Podcasts can be found here:
https://www.wvomfm.com/maine-outdoors-podcasts/The Old Town Trading Post ( Old Town, Maine...10 miles north of Bangor, ME). used to haves several guides associated with it. Might be a source for you.
