Suggestions for Yak Bass trip

A group of friends and I take trips to the Yakima canyon for trout at least once a year. We rent boats and drift all day.
We want to do something different and fish for bass down river. We still want to rent boats, but prefer not to use a guide as we would probably just annoy them with our antics anyways.
Any suggestions on places to rent 2 or 3 drift boats and what area to drift for the day? We are aiming for mid May for this trip and will stay in a hotel for the night before and after.

Thanks in advance.