Lots of good suggestions have been provided above. I recommend that you have a look at the RAF Airfield Guide (
http://airfield.guide) for some additional ideas.
In Central Oregon, both McKenzie Bridge and Toketee airfields survived the 2020 wildfire season without damage – both are nice for camping. You might also enjoy visiting Horseshoe on the Deschutes River and Chukar Flat on the John Day River.
You can also camp at Prospect State (64S) and it’s a short walk into town to the tavern. There are a couple of cabins available to rent at Wild Billy Lake (
http://wildbillylake.com/) and the fishing is good in the spring.
I’ll second Jake’s recommendation and strongly encourage a visit Hell’s Canyon, but suggest that you plan your visit there before the temperatures get too hot. Consider Temperance Creek Lodge as a base of operations for a couple days. If you contact Hell’s Canyon Packers (
https://hellscanyonpackers.com/lodging-hells-canyon/) they can provide accommodation and meals. Alternatively, camp at Dug Bar.
From Hell’s Canyon pop down to Owyhee Reservoir State (28U), then follow the spectacular Owyhee River Canyon south to the Rome Service airfield (N42.833698, W117.628998). This is a dirt airstrip located behind a café/gas station where you can grab a bite to eat. From here it’s a quick flight west to the Alvord Desert (N42.527199, W118.525002) – not to be missed. Before you land, be sure the surface is dry!
From Alvord, follow the highway south to Fields Station. There is a café/gas station with absolutely the best milk shakes. There is so little traffic that folks frequently land on the highway and taxi up to the café. If you prefer to be a bit more cautious, there is a rough dirt airstrip across the highway, behind the school (N42.259998, W118.665001). You can camp at the airstrip.
Lucas Lodge in Agness (N42.555500, W124.066002), on the Rogue River is a good bet.