Have been through in Feb. The first thing I googled was
https://yorkcavingclub.org.uk/blog/61-croesor-rhosydd and although it's 10 years old is still fairly accurate. You can do it without any zip line pulleys, as the zip line is optional, but who doesn't enjoy a zip line?
Be warned: the canoe is on the lake and various accounts on the rope/canoe arrangement are mixed, many people say it was fine, personally I found it jammed. Be prepared to swim in worst case (or reverse out again) maybe be more prepared than a pair of Spiderman arm bands which was my "safety kit" for water
There have also been issues with the short "up" rope immediately after canoe where people have pulled it up or cut it down but there are bolts to aid up there in emergency. A large group recently got lost in Rhosydd so read a few different descriptions of that section, but if you've been there before...
Debates on where to park, some will say park in Crosoer SH 631 446
https://maps.app.goo.gl/wv9FoQhjocJDxGug8, I'm much more on favour of
Car park
https://maps.app.goo.gl/4VUKxFdwBx8rFNgd7
for various reasons including easier walk out, and cafe by the lake.
All usual warnings about being a grown up apply.
It's still a 4 * classic