Taking nanny to vacation home

Wondering if anyone has been in a similar situation and looking for advice! We have a family vacation home we spend a week at every summer. I was just going to pay our nanny for the week and let her have it off but she asked if she could come. She’s a single mom with a 13yo daughter (who will be coming with - we love her) so it’ll be a vacation for everyone and the extra set of hands will be nice.

I don’t know how to handle the payment situation. We eat the majority of our meals at home (maybe go out once or twice) and they’re more than welcome to eat with us but I also don’t want to force them to eat with us if they don’t want to lol. I was considering maybe giving her a food stipend for the week and she can do what she wants (eat with us, not eat with us, etc.)

I’m also concerned about the hours - it’s not going to be our normal 8-5 situation. There’s going to be a lot more fluidity, I really won’t fully need her that much and I also don’t want to pay her a fortune beyond her weekly wage.

Thoughts? I want to be fair.