It’s going to be raining, especially on Wed. I can’t see how it sumps on the normal route, but the big pitch gets very wet. If you are worried then also rig the Lancaster entrance, this will prevent you needing to go to Wretched Rabbit to avoid embarrassment.
Back in the days when we used to walk up from Barbon to avoid the grown ups who were allowed to have things called “permits”, my wife and I used it as a less popular route in to the system when we were first exploring it. I have fond memories of trying to come up with different ways of climbing the rift at the bottom of the squeezy bit. A short ladder being the best in the end.