When making summer plans to spend time away with your spouse it helps to plan well for those that will be caring for your children.  I've always tried to be overly prepared for a long-term sitter.  It has helped the time to be a blessing for the children and the ones caring for them.

 Mrs. Happy Housewife has a great post about this very thing. It is basically the same thing I do for people who watch our kiddos.  I keep all the basic info in a Word Doc and just change what is needed for that situation (ie. addresses, phone numbers, etc).