Pre hairdresser appointment??

So it’s my hubbys xmas do on the 8th dec and I really want to get my hair put up professionally this time round, but my fella is in the armed forces and I don’t live where he is based.

I will have to get it done near his base on the morning of the do, but if I phone and book into the hairdressers will they need to see my hair before the appointment to know what they are working with?

I don’t really want to travel all the way there before hand just so they can see what type of hair I have ect. X