I'm suggesting the time might be ripe for a new but old school, noiseless and graceful alternative method of travel, (and a few improvements for camera enthusiasts).
Hot air balloon. The marquee feature allows the player to glide across the reserve with the will of the wind. A silent way to cross distances, with no directional control but potentially traversing difficult vertical obstacles with ease. Journey to open a new outpost, overcome a mountain or cut across a large lake, enjoy nature from above, and disturb no wildlife in the process..
From outpost/tent, a one-person cloudhopper is requested via Garage. Barring awful weather, the balloon arrives.
At a button press the player enters the harness/basket, another press untethers the balloon starting drift with direction and speed of the wind. Two controls: "burn" to gain altitude, and "release" to descend.
Journey ends when balloon is close to the ground (say 5m), over open space. Player is offered option to "anchor" which tethers balloon, and player may exit. If properly tethered, the balloon is standby for journey to be resumed.
Journey also ends if a player hits into an object ( "knocked out by a mountain/tree/velocity") or drifts beyond the borders of the reserve causing respawn as always when going out of bounds.
It's impossible to use weapons mid-flight, only binoculars and camera.
Powerful new camera lens, improving upon the existing camera with superior zoom capacity.
Portable lights, making properly exposed night time photography (and trophy shots) possible.
-Ideally this update would accompany the bonus "Hunter Classic trophy photo feature", and fix to the PS photomode.
I don't have an actual idea how technically far-fetched this is, but my wishful gut feeling is that the so many of the tools and assets are already in place to assemble this DLC/implementation without major challenges or considerable drain of devs' time and resources.
[ed: restructure]