Where I hunt/guide long distance optics only do you so much and being able to glass a bull at relatively close range in the timber is paramount in ensuring it is a legal animal.
Slim loadout not meant to be able to pack meat or carry much more than enough to be comfortable during the day and survive an unfortunate night out.
If you are hunting with a guide leave the calling to them. Practice with your calls before you go. Sounding like a toddler with a kazoo is a good way to send an elk packing. Simple calls that can duplicate pretty much any call you need.
These western elk hunts could result in lots of sweat or bone chilling cold. Layer appropriately.
Durable and relatively quiet compared to other rainwear.
Wool socks, gloves and a beanie can make the difference maintaining insulation even when it's wet.