You can delete the stop from the trail and publish the trail live again. If you think the stop is integral part of the trail and would like to keep it, just arrange put a photograph of the stop in the same place where the directional information in the trail takes them to.
The visitor can use SKIP and go to the next object. The SKIP button will appear typically after 10 seconds.
There is a RESET button in the pause menu which the user can press reset their progress and start the trail again from the beginning, However they can always press RESTORE button and restore all the progress they made – which is all the stories they unlocked and activities in the trail. That way their progress is always saved in their profile.