Check craigslist.org in your area under the 'pets' section. You can probably find a few in home dog nannies/sitters who will watch your dogs like they are their own!! I have found both my amazing dog nannies on craigslist. BE SURE to thoroughly interview them and make sure you get references and check them out!!! I also found one nanny who was great but didn't work out due to health problems on care.com. There is a one time fee but you will get many applicants and you can post a job and w/ what your requirements are, what you're willing to pay, and what you expect from a dog nanny!!!
I could NEVER kennel my boys so this is the route I went and found a few GREAT people right in my area!!! Peace of mind and you will actually enjoy your vacation!!!!
Good luck, I know how hard this can be!!!
Viv