I think you already have the essentials. I would add some kind of cheap tripod and universal bino mount to glass from. Wouldn’t spend more than $50-60 on that. Make sure you have a rangefinder and practice shooting to 300ish yards if you are able. Otherwise it’s hard to know what’s really important to you until you go. For tent camp you may want to consider some kind of heater, and bring your down comforter from home to throw over your sleeping bag. Otherwise you will end up miserable and looking to the nearest motel!