Guests 'Local' & 'real local'
If, as you say, you wont miss 'outsiders' if they didnt come how will Whitby survive?
The majority of your income is from visitors (see post above re. tourist season) so I would think it in your interests to encourage rather than name call.
Luckily, most people in Whitby are friendly unlike yourselves.

As to drink prices - its OK saying that they are about national average but remember that wages in this area are BELOW national average.