Nice pictures, and beautiful scenery. Colorado appears to be more 4x4 friendly than Washington State, as the U.S.F.S. loves to put barricades on access trails to mountain summits in WA.
If you decide to go for 18" rims, a perfect 32" O.D. tire would be the GENERAL - GRABBER AT2 in P275/65R18 (32" O.D./44 lbs). This incredible lightweight AT tire is snowflake/mountain rated; pre-pinned for studs (if desired), has a deep 17/32nds tread depth and sells for only $150 each while giving you 1.25" more ground clearance over stock. If mounted on the stock OEM 18x7 rims; they are bolt-on perfect with only minor front trimming without any lifting or front torsion bar cranks, thereby preventing possible CV issues caused by lifting.
If you're looking for OEM 18x7 rims, I have a complete set of 4 wheels for sale at $290. Congrats on your purchase, and welcome to the addiction. Thanx for sharing your pictures with us and we look forward to hearing more from you in the future.