I am going to Banff, AB canada this summer and will be stopping by yellowstone WI for few days too. Can you imagine how beautiful will that be! :) So far i found reasonable price and i would love ur opinion on those 2 camera i found.
Nikon Digital SRL Camera with Compact 3x Zoom DX-NIKKOR Lens with SWM and VR Function - 24.2 Megapixel (D3200KIT)
Canon EOS Rebel T3i - 18.1 Megapixel Digital SLR Camera (5169B003)
Read more: Which camera is best for night sky at the reasonable price up to 1000$?