Antelope is mostly a glassing game. You want good optics, and Leica and Leupold will get you through.
I'm a fan of the Leica Range Finding binos. Saves the hassle of switching between optics and range finder. With antelope, shots may be far and you will want an accurate range.
I'm a huge fan of the Leupold GR spotting scopes and they work great in any condition you may encounter antelope hunting.
You don't have to be so picky with a tripod mount. Go to any camera store and pick up one for 60 bucks. But if you want the best and something that won't fail I suggest a Spartan.
Don't forget a Phone Skope for getting pictures of those potential shooters.
Let's talk packs. My pack is an essential part of my antelope hunting. It's a steady rest when needing to touch off a shot. I prefer a pack frame due to I tend to kill antelope far from any access and end up doing the gutless method and quartering to get them out.
Getting animals cooled immediately is essential if you wanna have the greatest table fare. I always carry game bags on my antelope hunts for this reason. You ever roll through a small Montana town at noon on the opening day of antelope season and see a nice buck antelope gutted and sitting on the back of a flatbed pickup? Then the same guy says antelope is gamey and stinky. Getting that animal broken down and cooled is a top priority after notching your tag. Quartering in the field will help with that.
The weather and temps can range so much on these fall antelope hunts. I suggest layering and being prepared for extreme heat and extreme cold.
I always am prepared for colder weather on these antelope hunts. I usually keep a wool cap and some mittens in my pickup. But generally your lucky ball cap and a pair of leather gloves will get you through.
I'm a big fan of the .270 win for antelope. You can generally find a wide variety of bullets at any sporting goods store and has excellent ballistics for those further shots that may be required.