From what I understand, natural resources FED LE jobs are very competative. I know a guy who is a NPS Ranger at Yosemite and he loves it.
For those that get the job, I hear they never look back. Keep pluggin away at BLM, NPS and USFS, and continue your education, specializing in something outdoorsy. They look for degree's specializing in outdoorsy stuff, and stuff.