Well, at least it’s not another Black Butte. It is also a nice road walk of 5 or 6 miles RT. The distance depends on whether you start at the turn off of the good gravel road or whether you bounce your way up ~0.3 miles to the gate. Elevation gain is 1000 or 800 ft respectively.
If you find yourself on US-26 at Dixie Summit, just east of Prairie City, you could activate Dixie Butte, http://www.pnwsota.org/blog/k7atn/2018-november-25/dixie-butte-or-june-2017, with your high clearance vehicle, or you could park your Prius and bushwhack 1.5 miles RT and 550 ft. of elevation gain to 5784, or what I will call Dixie Summit Peak.
This was my first time up Barlow Ridge in the summer. Park at the Barlow Pass Sno-Park with a NW Forest Pass. The trail is well-marked, albeit the signs are up high due to this area's popularity during the winter. I encountered quite a few large blow down trees at the start of the hike, so be prepared for some significant tree scrambling.
Summary - the hike to 3977 (from copper creek) is relentlessly steep, easy to follow and ends in a summit with great views. The route on FR 41 from the Sunset Falls campground is festooned with holes and washouts, some of which are spectacularly large.
The views from Hidden Peak of the Eagle Cap Wilderness are amazing and worth the trip. There are a couple ways to get to Hidden Peak but the easiest is to purchase a day ticket for the Wallowa Lake Tramway ($38 per person as of 2021 - https://www.wallowalaketramway.com) to the top of Mt. Howard, and hike south along an unofficial ridge trail. If you are planning to backpack for a few days let the staff know you won't be taking the tram back down as the tickets are only good for one day and you'll need to hand them your ticket at the top when you disembark.
This is a near drive-up in a carefully driven Prius, or perhaps a full-on drive-up in a vehicle with some ground clearance.
An easy summit in the John Day area is Long Creek Mountain. To access it turn east off of Highway 395 on NF-3940. This turn is at the Long Creek Summit, 44.6789, -119.1309. The turn off the highway is steep, but I believe it is Priusable to 44.6626, -119.0480. From here it is half a mile and 250 ft. of gain on a rough road to the summit. You can drive it with high clearance and your mirrors folded in, if you don’t mind a few paint scratches.
If you are touring anywhere near Crater Lake National Park, Garwood Butte is a quiet destination for an activation. The forest road is fairly Priusable and the hike is reasonably short, even if a bit steep in places. As for a number of other summits, one reward for making it to the top is a historic fire lookout. The "upper" trailhead is about 1 mile and 600 feet of gain - from Forest Road 3703 (Three Lakes Rd) it's about 2.3 miles and 1000 feet.
From Roseburg, Oregon turn on OR-138 East / Northeast Diamond Lake Boulevard.
Summary - Lookout is drive up with a wide open summit, though parts of the way up aren't for the faint of heart. There is a small comm facility that doesn't generate appreciable RFI, a couple of places to set up, and when the clouds aren't in the way, excellent views. Bring a mast if you want to put up a wire. 2M contacts are possible with a 1/2 wave whip but a yagi will make things a lot easier. APRS is easy from here, too. Drive time from SE Portland is about two hours through Stabler and out Hemlock Road (turn at 45.80838, -121.90741).
Summary - The trailhead for Bells Mountain (45.79834, -122.40197) is about 45 minutes from SE Portland, the hike is an easy 650' climb on a rock-and-gravel road, and 2M contacts into Portland and Vancouver are possible with a half-wave whip. The view is open; you can see downtown Portland and with trees on the bordering the clearing, it is easy to get a wire into the air. A great "first season" summit. A Northwest Discover Pass is needed to park at the trailhead.