Yeah crabs, drakes, and treants (there maybe be a few I'm missing) you can walk past which is useful for some camps (Isles of Umbra and South Bloodshore are nearly impossible without walking past the crabs due to the number and small manuverability around them.), sadly in most of the camps though mobs you can walk past are mixed in mobs you can't walk past and thus you end up having to run for your life no matter what.
A few generl tips for getting all the gates:
-Don't wear gear, you'll end up dying a lot trying to all the camps and the deaths will really wear out your gear also pretty much all the mobs that can one shot you are going to do so gear or no gear so best to save a little hassle having to repair
-Set HP nearby, again you're going to be dying a lot and long travel times ruin moral and just add to frustation
-Know which mobs to avoid and manuavers to avoid them, mobs like raptors, efts, and boars are easy to avoid as long as you don't run directly through them, mobs with ranged attacks like drakes and hippogryphs are pretty much certian death if they aggro within a small distance because of thier ranged attacks (which Decoy can help avoid)
-Certian camps are just harder than others (off the top of my head: Lasthold, South Bloodshore, and Scorpion Keep are all a major pain), if you're having a hard time with getting a camp, try working towards another camp and come back to it later
If you need any more tips on a particular gate I can try to help, I got my last one last night and since some of them are still pretty fresh I could probably get more in depth information for certian ones.