Do you keep LO in daycare/with the baby sitter or use grandparent care?

My dad is coming from overseas to visit for 2 weeks and I can't decide if I should keep my son in daycare at least part of the day, or keep him home with grandpa the whole time. Same for my daughter, I can't decide if I should have the babysitter still come once or twice a week or just let my dad handle the kids. I know my dad wants to spend as much time as possible with them. I'll be working on a part time basis at home while he's here, so in any case someone would have to look after them the hours that I'm working. I will still have to pay daycare regardless, but not the babysitter.

What would you do in this situation?