In a sense....Yes You can mount a trail camera up high out of reach,but is it at a correct angle aiming in the correct exact spot to pick up movement or heat change so it can go off or catch a Deer,Coyote or Trespasser where You can Identify it good and clear?It also needs to be Un-detected so it doesn't get damaged or stolen... Lots of variables.
Most trail cameras need to aiming north or south so it doesn't get white washed out from the glare of the sun,if in the Woods shaded it is more forgiving and with the new cameras having the IR option even the Red Glow seems to scare off some Deer but when set up higher at an angle it was much less noticeable and not spooking the Deer as bad....now the Black-Flash (No Glow) trail cameras it's even better and totally non-detectable from Deer or Humans and several newer IR cameras don't have the Ghostly Blurrrrr either!