What gear do I need?

Really interested in doing some bike packing. I was gonna build an old trek mtb but I’d like to see if I can just use my rock hopper (pictured). What gear do I need to set this thing up for bike packing, and is there anything I should change on the bike mechanically? I have it set up as a 1×10 right now which I like a lot. Wondering if there are better stem and handlebar options for more sustainable long rides.

I also have a stump jumper that is built as more of a mtb (also pictured). If that would be better let me know! I have maxxis dth on the first one and mtb tires on the second.

Thanks so much!