My only experience of helping at lambing time with a hebridean flock involved a daily check, catching up any newborn lambs(before they get too lively!) to tag and spray navels, write records. This flock was a conservation flock, they were brought in off the hill before lambing to lamb outside. Purchased primarily as grazers initially they were not lambed, however the Hebridean society persuaded the owners that they should be lambing them and keeping the bloodlines going, and that that due to the breed lambing would be straightforward with minimal intervention required. There were no assisted lambings, just new lambs to be seen in the morning. Only one problem was encountered, there was one ewe that was found to have old mastitis and no working udder so the lambs had to be taken away for bottle rearing, udder checks prior to tupping would have ensured that she was not bred from so this could have been prevented. Assisted lambings were not known in the flock.
Our own flock of sheep however do get supervision and regular round the clock checks during lambing. Normally OH usually does checks up to midnight and I start checks at 3.00am, then 6.30am or so. This works well for us as I have a sleep problem so will be awake at 3.00am anyway. However this year plans went awry as I managed to break my leg at the start of lambing! Poor OH has had to do everything initially - and coped just about! After 3 weeks or so I have managed to do the night checks again, so at least OH can get a decent night's sleep as he has to manage most of the day jobs still. I haven't been able to manage to get around the fields at night to check just in case any ewes catch us out with their tupping dates, we have been caught out by 4 ewes lambing out in the field overnight, but good to find them with nicely mothered on lambs in the morning! I am looking after the sheep in the yard, and bottle feeding the cades. We certainly had to be adaptable this year and change our plans, but fortunately have got through it ok, main flock finished last week, just a few hoggs to lamb now. Next year I will try not to break my leg!