Sorry but what do you think about after the sail barge and how they part ways and the Lars Homestead idea as this is totally new territory and was a bit unsure about how it played out myself... This was really difficult to try and do and make it plausible use the other link you can skip now....
your right about the sandworm that where is this hapenning? would it help to show a hairy bantha foot in the foreground perhaps to explain that is meant to be happening right next to the herd.
I tried to accomplish this with sound but it obviously did not work