Hwy 20 runs east from Bend, through Burns, and ends up at Vale, Oregon, just prior to crossing into Idaho. It is predominantly a 2 lans road running through high desert with nt much of anything to se except the occasional cow. Just sagebrush, rabbitbrush, and an occasional Juniper tree! The road is fine, pretty straight until you get past Burns and then follow the river where there are lots of caves, but not bad a log as you watch your speed and signage. We took this route last year with our class C towing a jeep and all was well. You should have no issues doing the trip. Watch your fuel level, as once you leave Bend, the next fuel available is Burns, then Vale, Oregon. Crossing over into Ontario, Id, there are lots of choices. Not sure where you are planning on stopping overnight, but there are not many choices until you hit Idaho.
2019 Tiffen Allegro Open Road 32SA
F53 / 24000# Chassis
2008 Jeep JKS
Ready Brute Elite / Blue Ox BP