Pitlamp: Ah Wild Boar Fell West, a place of great potential. Clouds Gill and the limestone plateau above are well worth exploring if only for a good walk. Good luck with Preachers Cave.
The other Dales cave that is a bit 'Sleets Gilly' in its layout is Pate Hole, another location where there's not much known cave but plenty of limestone and plenty of water.
As for Sleets Gill, I've been down when the downstream sump had backed up to within about 3 feet of the roof at the lower end of the Main Gallery. We were young (about 15), stupid and were not going to let a bit of damp put us off after a 35 mile bike ride to get there. Forty odd years on, I break out in a cold sweat when I think about that, especially after the amazing rescue a few years ago. I've a bit more sense now, honest.