I agree, Ground even laid radails being resonant is (IMHO) very relevant as even though they don’t radiate, they effectively form the other half of the antenna from the vertical. The recomendation of 4 x 10 ft. radials would not, in my experience, be as good as a radial (or counterpoise) cut for each band in use (in this case three). As I said above, I have found that rather than laying the wires out in different directions, taping them together makes them easier to transport and deploy and if you can run this combined set of wires out in the opposite direction to the direction you hope to get the most contacts, it “can” have a “slight” directional effect.
Having this set of radials/counterpoise wires raised I believe means they do radiate a little and hence can improve the antenna performance. I tend to use loaded verticals on a tripod and hence the counterpoise is raised and then slopes down to the earth some distance away.
73 Ed.