ponder... 9mm (G34) .45 (custom 1911) 5gal bucket of brass .22lr 870 or Benelli... AR10 ... 5.56 carbine 55grain
IMHO - those are all quality barter categories. I will expect all of your centerfire ammunition to be in short supply in the future. I am stocking a significant quantity of .308 & .223. Both are in high demand in Idaho. I also favor long range targeting with a Remington 700 Sendero in .300 WM.
If you are riding thru Idaho, you can resupply here.