Reddit mentions of Carhartt Men's The dex Spandex and Goatskin Work Glove, Black/barley, Large

You'll want a piss bottle so you can piss in your sleeping bag at night- like collapsible water bottle with a wide mouth. And get the wide mouth one. It's easy to underestimate your girth in a store.

Never wear base layers for movement (humping, not shitting). You want to be chilly when you step off. It's easier to ditch the jacket while moving than your thermal underwear.

Put all your clothes in the bottom of your sleeping bag at night. It will help dry them out and will fill up any empty space that you would have to waste energy heating up.

Always wear gloves when handling white gas. It can be well below water's freezing temp and still liquid. If you pour it on your hand while filling fuel cans you'll get instant frostbite. I wear regular carhartt work gloves for most everyday tasks and only wear big insulated gloves when the weather is really nuking.

Also, look up pressure breathing. It will really help you out at altitude.

In a bugout bag I would have heavy duty for an urban environment where you might have to deal with moving a lot of metal or glass. Otherwise I would just carry a good work gloves that has plenty of flex, leather reinforced palm, and you can wear all the time.

For a prepper they should have some heavy duty gloves. They are cheap and easy to stock. Sealed they should be good for many years (though I have not researched how long they would actually last).