might be doable depending on your camping style. Are you an ultralighter or do you prefer more creature comforts of home? If the latter then I would definitely agree with Celia and Remeny. If you are experienced ultralighters then I would look at making a trip of the whole river.
What arrangements can you make to get the kayaks back to the vehicles when the trip is over if you do the entire river?
Rescue / Throw Bags
URCHIN Portable Anchor