The key thing is to check that each lamb has a good bellyful of milk, and to take action if not. You would do that whatever breed and whatever circs.
I tell everyone to believe nothing but a full belly in any circs. Seeing a lamb under a ewe, sucking away and waggling its tail, is not a good indicator of anything except hunger and questing
They can be sucking wool, or the leg, in any ewe, not just a very woolly one
ETA I did have to help my Wensleydale with her first two lots of lambs. Wool trimming may have helped with the second, but she was just being an idiot first-time mum with the first. Lol.
If you find you do get problems this time, with more than one or two, and you want to avoid it next time, then next year, crutch them a few weeks before lambing - when you do heptavac, or copper, or other intervention.