I notice in the DB there's two channels with that frequency. I'm guessing one is for simplex, have you heard that channel being repeated before?
Can't say that I have. However, I have picked up quick unit-unit chat on the tac channel in the past. Usually it's discussing where to meet up or who wants which type of coffee. I also have heard F&W units doing traffic stops before on regular OSP dispatch channels, but that was a few years ago when OSP's budget was really crunched (not that things are *that* much better now).
I wouldn't be surprised if, in addition to using cell phones to coordinate activities, F&W troopers were using some off-the-shelf "solution" to keeping their short-range comms secure. Something like Motorola's DTR radios or TriSquare's offerings, both of which use 900 MHz frequency-hopping. Wouldn't be much for range, but it would allow them to talk to each other, along with staying off the easily-monitored CB/FRS/GMRS channels. (But I am just daydreaming here.)
Either way, I think they do a lot of sitting and watching behind a pair of binoculars, more so than talking on the radio. Same goes for USFS or BLM law enforcement. You might hear them check in on-the-air (usually on a county sheriff dispatch channel) or run a plate and that would be it. I've only heard limited traffic on the allocated USFS LE frequencies, usually just short unit-to-unit traffic. Compounding things further is that some counties enter into a contract to patrol certain USFS and BLM land in federal vehicles, but using a county deputy behind the wheel. NPS is another matter; Crater Lake has their own small dispatch center, but after-hours they have a contract with dispatch out of Medford.
I guess the moral of the story is you don't really know who is going to be patrolling the backcountry, could be just about any agency, operating on a myriad of radio systems.