We make that trip a lot going to Albuquerque from Spokane, WA. From Albuquerque we head to Bernalillo about 10 miles north and then to Farmington & Aztec and on up to Moab, UT. Then to Price over to Spanish Fork, through Salt Lake and up to Boise. The highest pass is around La Grande, OR and it's not too bad. From there it's an easy ride down the Colombia gorge on I-84 to Portland take the by-pass and on to Salem. Our daughter lives in Jefferson, so we travel that part pretty regularly, too. Right at Tualatin there's a wholesale RV store
https://www.rvpartsoutlet.com/newstore/nojava/index.cfm where you can pick up RV stuff really cheap - (new stinky slinky?) about one mile from where the bypass meets I-5. Have fun!