Hi Phillipa; yes, dogs are welcome both on the camping field and in the pub. Two provisos; it's lambing time, so leads are essential at Easter. Second; Geoff the landlord of the Three Stags has lots of dogs of his own, including a small pack of beer drinking whippets, who 'rule the roost' inside the pub. If your dog is sociable, it's not a problem, if not, beware drunken whippet bitches, who can be a little territorial at times. There is a bus that runs from Buxton to Baslow and goes past the pub, and there is a railway station at Buxton. Getting there could be easier though; if you go to Buxton someone is likely to be passing and may offer a lift (me, for example.)
Very best,
Tim