Vendor Meal/Tipping Question

I have a question about the meal of my hairdresser. She is coming on Friday night and staying (with her husband) at the Harrison House where our wedding will be held on Sat. morning. They are both going to do my hair and my bridesmaids hair and then stay for the wedding. She is not a close personal friend, although we are quite friendly and a personal friendship is developing. I'm wondering if she sits at a table can her meal be considered a vendor meal (if so, I would save $100 each on her meal and her husband's meal). What do you think?

Also, How do I tip. My florist, photographer, D.J., hair stylist and make up person are all the owners of their businesses, or independent. The only people who are not are the string trio. Who should we tip and how much?

Thank you Thank you for your help!

You have FM from Melani Bene
Ariana Waterfall Caterers

Thanks for the FM, but one further question-what percentage of each should I tip.

Here's what I'm spending:
DJ-$1450
Flowers-$3500
String Trio-$850
Catering-$125++
Hair-(for myself and bridal party)-$1000, but vendor is also friend who is invited to wedding-we are additionally paying for the room w/her husband for the night before, and arranging transportation.
Makeup-$100 for me, $45 for each girl
Photos-$2200, doesn't include books

All of the above, except catering and string trio, own their business or are independent.

Any suggestions? Thank you!!!!