The text on that page says, "You are welcome to use these images, however, you may not use them for any commercial purposes."  Technically, I don't think Pacific Northwest National Incident Management Team 2 can claim copyright on government photos, but I think the lines are blurry since they're making a request like this.  In other words, I don't think Wikipedia can directly use these photos with the text given on their web site.  I would consider writing to the PNW Team 2 webmaster to ask if they'd grant permission.  You could explain to them that Wikipedia and its mirrors won't be reselling the photos for profit, and/or you could mention that they shouldn't be claiming copyright on government works anyway.  Or, you could contact the Forest Service directly to see if those photos are available through a channel other than the PNW Team 2 web site.   (Elkspeak)