Wedding day hair with an out of town stylist

Ok girls, so I am having my wedding in my hometown which is about 2.5 hrs from where I live now. I love the girl that does my hair now, and would love for her to do my wedding day hair as well as my bridesmaids (only 3 of them), but I know she does alot of business on Saturdays and I am not sure how much I should offer to pay her to come and do my hair on the day of the wedding. I have really thin, fine hair and I am afraid to hire someone new to do it and I don't have a lot of time to go to my hometown for trials so it would be easier to do them where I live now. I should also add that my stylist also hasn't ever traveled that far to do wedding hair so she is not sure how much to charge me also. She says she is going to ask around, I just wanted to get a number in my head that people would pay. Thanks!