Definitely get them used to food, it makes life so much easier! They like a routine too so will get used to being fed the same times of day. Its also very useful to feed them in an enclosed area so you can catch them in emergencies.
I would ask the vet to call in and see the sheep too, vets will usually dispence drugs over the phone if they have seen the animals previously. You could also ask advice them practial advice on foot trimming, antibiotic spray and fly treatment, worming etc.
Essentials are foot trimming shears, antibiotic spray, wormer/fluke, fly treatment and preventative (pour on), lots of scissors for trimming fleece away from fly strike and poo on bums.