FYI I have driven from Salt Lakr to Portland to Salt Lake only stopping for bathroom and gas. It sucks and at least for me took a day to recover.
Edit
Stopped in Snowflake UT, Mountain Home ID, Fruitland ID, Le Grande OR, Gresham OR, Slept interviewed Battle Ground, Vancouver WA, Le Grande OR, Idaho Falls ID, Home. Twenty hours of driving in like 48 hours.