Thanks for the great suggestions RognBon, Marv Hoag & Tin-bender. Researching them now and I'll let you know what we decide.
Yes, we often look for interesting things to see along the way. No, not in a hurry...we have the whole day to make the trip with no other plans. Just need to eventually check in to our destination campground in Crescent City sometime before dark...most likely leave Reno before 8am...so we'll have time to check out some stuff along the way.
Thanks Tin-bender for the tip on the rest stop and scenic overlook @ Mt. Lasssen as well as the Straw House. All are now on our list to consider and making us lean in the direction of that route.