2500mi one way is about right depending on your location and destination.
You're looking at 3 solid 16 hr days behind the wheel. Only you can decide if you're up to that.
I'm presuming you don't have many/any long road trips under your belt or you wouldn't be asking the question. So take the 16 hrs on the road, add an hour at night and in the morning for eating, winding down, waking up, first fuel stop etc. are you good with 6 hrs max sleep in your camper for days on end?
Not sure what's in Oregon for you but 10 days X country and back and expecting the destination to be a vacation is not what I'd call any sort of vacation.
Add in 2000 mi of headwinds that you'll inevitably hit driving straight west, if for no other reason than your in a hurry to get there and you can add more hours to your trip.
None of this considers a 16-17 year old truck loaded to the gills getting pounded down the road for 100 hrs straight there n back. That type of service also tends to bring out the worst in old vehicles that are just fine doing daily commutes and little weekend trips.
