A few possibilities
Hi Murdock:
One way would be to first build your TT up to 1,500 hrs instructing, about two years at a busy school. After that there's a couple of things you could do. #1 Apply to Columbia Helicopters in Portland to be a co-pilot. During the summer they fight fires all over the Western US in Heavies, which is the best job on a fire. After you've spent a few years with them, they'll put you in command of a light aircraft, (eg. H500 or 206L) hauling chokers. A few years after that you can be commanding a BV/KV107 logging and fire-fighting. It's the best of the Heavy lift world, log all fall, winter and spring, fight fires all summer. You won't face layoffs or loss of contracts either.
Option #2 is to go to Temsco in Alaska or Papillon in the Grand Canyon and fly tours for two years. (Contact Eric Eichner at Temsco, Chuck Rush at Papillon) At that point, they may bring you on as a utility pilot and put you on a fire contract somewhere, but it will be in a light aircraft (eg H500, AS350 or B206L). You can still have fun on a fire if you're the first one there, but once the mediums or heavies show up forget about throwing water. You'll be the mapping ship or Air Attack, or occasionally you'll sling cubies into a crew. If fire-fighting is your goal, go all the way into heavies.
Just my opinion though. Ask around, see what other ideas you get.