I stumbled on a local California outfit named Baja Designs. Their lights are made in house and warrantied for life. Seems like a real deal kind of American company. They had a video explaining offroad driving light patterns needed. Off course they were talking mainly about racing, but they did mention the need for side lighting to see when turning and sliding. They showed a race truck with a set of lights mounted pointing sharply outward like 45 degrees. They make all kinds of configurations, and types from LED to HID, including bars. They make a small two LED light that's 2100 lumens each and about 2" x 3" that I think will work for my needs. I plan to run 4 of them. But just ordered 2 for now, just to try them. If they are what I want, I'll order another set. I plan to have a set pointing outward and a set pointing straight ahead. The first set I bought are wide beams. The second set may be tight beams. I want the independent lights so I can adjust them as needed. Straight ahead lighting is going to be covered mainly by the headlights while off road. I drive fairly slowly off road, but winding trails can be hard to see to the side.
The Jeep guys are putting lights on the mirrors pointing out about 20-30 degrees. That's probably the ideal location, but I don't want to get into wiring and mounting in the mirrors.
http://www.bajadesigns.com/ProductDetail?ItemNumber=480003
Here's their approach to lighting needs.