I could not hunt without my binos either. Out west, we glass huge expanses of land for a peek at a bedded animal. Might only see an ear, antler tip, legs, etc.
I can pick out a whole animal, or rump, or head a long way out there, easily a mile on a deer/antelope/elk, but it is not as common that you see an entire animal in the pines or Junipers. You might see them out in the sage or desert, but they are usually moving which helps a lot too.
I also just returned from an elk hunt, and in 26 days of scouting and 1 day of hunting, I probably had 250 hours or more behind binoculars. I think it is just a different style of hunting out west where we can do that. I bet it would be hard to do in thick tree covered mountains or flat terrain.
I use my Shooter on my cell phone for my ballistic firing solution, but I also figure out beforehand what approximate elevation and conditions I will be hunting and print out a drop chart and tape it to my riflescope. Out to 800 or so it is usually spot on. I carry a Leica 1600B and a Kestral 4500 too. Rangefinder for range, atmospheric, temp, and look angle. Kestral for wind if needed for long shots. But Inreally try to limit shots on game if possible. The longest shot anyone in my family has taken on big game has been a mere 662 yards. 637, 488, 432, and the rest have all been under 200 for a ton of deer and elk. But we shoot a lot at ranges far exceeding 1000 yards. Usually from 1200 to 1771 in preparation.