There was a book out called the Alaska Highway Angler, that is really quite good. Yes you need a license for each state, province or territory but I never thought any of the were trying to gouge me. I often had an Alaska license from living there, the got aYT, BC and Alberta ones. Then depending on where in the lower 48 I would buy the needed states.
In my RV I carry a pair of fishing rigs, a cheap fly rod/reel and a spinning rod/reel. They just lay in the back for instant access whenever we stop by any fishy looking water. My good rods/reels travel in metal rod cases, put away. I keep a small plastic box of lures to throw with the spinning rig in the back seat also. Many times just walking a quarter mile away from the road will put you on some fish, dollies, trout, pike, grayling, white fish, etc. like the OP said, catching is nice but but just being out there is also.
I throw small Mepps, gold spoons, Pixies, Dardevils, red and white mainly, and catch a few fish here an there. LOL
I have also talked to some very knowledgeable Fred Meyer staff at the Soldotna store in the sporting goods dept. The hardware store on the west side of the highway just north of the Kenai River bridge can't be beat.