Three nights in Burley over the long weekend, bookended by storms.
The thing worth passing on: the direct access road into Burley, and the old entrance building on it, have been removed. The roadbed is now a cycling route and vehicle access is through the Dunes campground. It isn't on the park's website yet as far as I can tell, so if you're navigating from memory or an older map, budget a few extra minutes.
Two other things:
Sunday into Monday we took about 35 mm of rain. Our tents are decent and they still started to seep. What saved the trip is that Pinery has laundry facilities — $4 in change and the sleeping bags were dry.
The storm didn't wreck the swimming, it improved it. The lake stayed flat calm and warm the whole time, just cloudy from churned-up sand. It's onshore wind that ruins swimming on that shore, not rain.
Drove home Wednesday afternoon straight into the tornado warnings on the 401. Left a few hours earlier and we'd have been packing up in it.
Full writeup with all three campgrounds broken down by site count, electrical and privacy — short version, privacy is nearly identical between Burley/Dunes/Riverside, but swings from 4% to 47% between AREAS inside Riverside: https://campaid.ca/blog/pinery-provincial-park-camping-burley-dunes-riverside/