You will have fun at either or both. Have to look at their class list but most Pleasure shows consist of a dressage class, reinsmanship and several ring classes (just like AMHA/AMHR), and several different kinds of cones courses. Look up the rules in the ADS rulebook.
A meadowbrook will look fine. Pleasure harness and dress formally, like for church. Remember, breeching, no checks (sidechecks are allowed in training but why) and no Martingale unless it's a false Martingale.
Just checked the NTW site and this is a fun day at Willow Draw. ADS rules for the most part but less formal and less pressure.
The TCA Carriage Classic at Cedar Creek is an ADS Pleasure Show. More formal. The judge and TD are from Canada and both are really nice guys.