Way back in 1987 I spent 3 weeks fighting wildland fires in Rouge River stayed at the rouge river park.
We hiked all over them mountains and I can say for a fact it is rough unforgiving country. Of course back then we did not have gps units just studied topos and made our way.
There are old mines ore carts the tracks for the carts to run on all over in the backcountry, we came across pot plantations back in the woods cause it was so thick.
Would be surprised if a gps woulda been able to get out the cover is so thick.
been on huge fires in Yosemete NP up north of Hetch Hetchy resevoir people just need to undertstand there limitiations. spent 15 years in the fire service and I still get a tad turned around at times in the backcountry.
Sorry it happened but it coulda been prevented.
just my 2 cents.