How comfortable are your cats in new situations and with new people? Are they very sociable or do they tend to be shy/fearful? Most (but not all) cats are better off staying in their home environment with all their familiar stuff, even if it means less human interaction. A common problem with boarding cats is that they often get so scared, they stop eating. Again, depends on how confident and outgoing kitty is. You know your cats best.
Here is a site with a professional pet sitter locator: http://www.petsit.com/