I'm not really sure about the Dale as I've not climbed there, but figuring out the problems on the roof is doable using the UKC logbook descriptions while at the crag, as they're very clear and organised and there's good signal. The majority of the problems start or finish for either Larger Lout (starts on a flake in a corner at the left side of the roof) or Dancing Man (starts in the middle of the shelf), so once you know where those go the descriptions for everything else make sense.