I'm slightly shocked the vet recommended not vaccinating, personally I would change vets they obviously aren't intrested in preventing problems, but that's my opinion.
It's well worth vaccinating with hep p plus, the antibodys are their for passed on in the mothers milk and prevents a risk to various problems, if you've had sheep on these fields few years now the risk increases each year, only a matter of time till one day you'll have a disastrous lambing, or start picking up nice healthy looking lambs dead, pets or lively hood it'll be heart breaking. For what it costs better to do even for peice of mind.
Don't have to buy from vets it's not prescription only can get it most farm stores.
As for worming worth doing an egg count, for the vet to say don't bother he must be telepathic to just know if they do or don't have a problem, if their infested enough will result in them pineing from worms taking everything out of them, be sure to take samples from a majority might be one or 2 you collect from are clear, and others full of them,and test again a week later, tests aren't always 100% along with this you'll know what wormer to use to cover what worms you may have, not all cover all worms. Fluke is harder to test for but one of the worst this time of year now. Hope this is some help to you