The best you can afford.
A good range finder is a must.
I like the Seek Outside six-man tipi with stove or a marmot tent. I also like a Kifaru sheep tarp for glassing. When it's sunny or raining, set up with trekking poles and tent spikes. Sleeping pad Big Agnes insulated pillow lightweight.
I prefer Peak Refuel; Mountain House will be fine as well. You can also make your own dehydrated meals. FBOMB nut butter. Stinger wafers. Energy chews, tortillas, top ramen, For drinks Warrior Fuel products. Black Rifle instant coffee.
I prefer 257 mag but anything from 243 to 300mag would be great. Most important would be long range capabilities, some shots might be 400 hundred yards plus. Hornady ELD-X or AccuBond Bullets are great options. Shooting advice: Know your gun. Shoot often at different angles.