We will be attending the Jimmy Buffet/Eagles concert on 4/14. Will we need to abide by the clear bag rule for this event?

Absolutely

Yes

Yes, will also no food or drink can be brought in from the outside. Best to just bring either cash or card along with ID, leave everything else in the car or place where you are staying.

I believe that applies to any place nowadays for concerts or other events.

I believe they all events at Camping World the rule apply too