The highest CLs we’ve had were during a summer week trip: 8/9s. It was grands’ 1st Disney trip, they were 2 and 4. Parks had just recently switched to fpps, from paper fast passes.
Due to all these reasons, I set up a personal TP for the 1st time. B4 I’d just gone by the standardized TPs.
I was amazed how well we did. With RD, fpps, afternoons resting and especially the personalTP, we actually had no waits at rides, beyond 10 minutes or so max. Only exception being a couple of rides that went down. So we waited a bit more for those.
Looking back, one of the key things to the success was taking the afternoon break. Recently reading Len’s article re how they gauge CLs, I saw that they base the CLs on time frame of around 11am to 5pm. We typically leave parks around noon, return after early (5pmish) dinner, which is either in that park or outside of it.