Please correct the errors, im not sure on this one.
The scouts or their mascot must do their best to clean up the mess at the campgrounds.
How can you rephrase to get rid of the second 'their'?
The scouts of their mascot must do his or her best to clean up the mess at the campground.
No, that doesn't work. The original is better than the "his or her" sentence.
The sentence you provided is grammatically correct and does not have any errors. However, if you want to clarify the sentence or make it more concise, you can consider the following suggestions:
- The scouts or their mascot must clean up the mess at the campgrounds.
- The scouts, along with their mascot, must do their best to clean up the mess at the campgrounds.