You can use parachutes on Duna,Just make sure you use several of them because the Duna atmosphere is thinner.As for the Mun,I took a Mun lander I made earlier,Built a small rover the size of a 4x4 Plate, and strapped it to the side with a decoupler so I could detach it when I got there.Just make sure You put the brakes on the rover first, I learned that the hard way because it rolled 3.5 km away before I caught it.Otherwise,I liked your method I saw in the vid,Much better than I could do:)