Here are the CB Frequencies. Note: We cannot use channel 9 (it's for emergency broadcasts) or channel 19 (main channel for truckers and special vehicles).
That said, I would recommend CB Channel 24 and FRS Channel 12.
And one last note: There is a national SOS group that recommends using GMRS/FRS Channel 1 in emergency situations as a last resort. So be sure to remember that and have one ready in case of emergency. For more info, go to:
National SOS