Lockett Road is a nice drive through the rolling hills of The Snake River Valley, with a glimpse of the river near the southern trailhead. Private land is on both sides of the road, so you must stay on the trail, and there is no camping along this route. No 4WD is needed; any high-clearance vehicle can make it.
You reach a cattle gate that you can pass through and then come to a fork in the road; if you take the southwest fork, you’ll hit a locked gate right away. But you can go through the gate to the northwest that says “Public Lands” to complete the loop back to Highway 84.