For those that have been to Dorney, KD and Carowinds, how does their ERT work?

On their sites, Dorney has it listed as "select days" and no time, KD has it listed as "each day" and a time listed so good there. And Carowinds has a list of days but they stop after July. (We are hitting the parks the first week of August on our way to Myrtle)

Before I contact the parks, just wanted to throw it out there to those that might be able to save me some time.

Thanks!

Here is the info for Dorney:

"Season Passholder will be allowed to enter the park 30 minutes prior to park open every operating day through Labor Day. In addition to early entry, Passholders will receive ERT (extra ride time) on the following days:

Every Public Operating Day
Antique Carousel

Weekends May 24 - June 29
Everyday June 30 - August 24
Antique Carousel, Talon, and select rides in Planet Snoopy"

https://www.dorneypark.com/season-passes/season-pass-benefits