I have my resume that I give to each family during an interview. At the bottom is a list of references of my past and current clients just with their names and phone number. I asked all of them for their permission to do that and if they would mind answering questions if anyone ever calls. They were all very quick to say yes. Of course I don't have the ones I terminated on my resume! You don't need a bunch of letters or anything, however I do have some nice letters of reference that a couple Moms wrote when they were leaving and thank you notes from a few others when they left.

Also, do you have a website? Feel free to ask your parents to put testimonials on there. I did and couldn't believe the nice words that they wrote.