Well, I cancelled the trip.
I should've gone last night and drove through the night but the weather was terrible, and was forecast to be rubbish too. I couldn't be bothered to drive all that way for four days in crap weather. The webcams show heavy rain and gales today, glad I'm not bivvying in it.
I'll see what it's like tomorrow and head for the Berwyns. I can ride there and back, so no huge drive to endure.
I'll see what time I can get off in September. That won't happen either, I'm dreaming, work is crazy in September.