[Mtntrek]

Looks fairly handy, thanks for posting.
The GPS options are offered by third party software developers that use the database(s) similar to the commercial carriers atlas. Some GPS models can receive aux. data uploads, others can't. I'm not sure I can justify the expense.
We carry 2-way communicators, safety cones, and operate under the "when in doubt, get out". Seems there is always something else to visualize at fuel islands too. Like speedy knuckleheads trying to slip ahead in line.

In several yrs. of FT'ing at 13'5" OAH, ironically the main issues we've run into are at mom & pop CG's where they won't trim their trees properly. Or have low wires, gullies, and culverts etc. YMMV