Forget the creeker, the lower Kern this time of year should be really great fun for river running in your playboat. The classic run is Miracle to the Bridge/Democrat. About 8-11 miles. Warm water, some great Class IV/III. Camp near the put in (Miracle Hot Springs Forest Service campground...) the surrounding area is nice, but hot this time of year. Did I say HOT????
For eats, check out the Kern River Brew Pub in (where else) Kernville, ...its owned by boaters,...Olympic-style.
And when you can't stand it any more in the heat, drive up to the Sierra or come down to SoCal to surf. The scene is much cooler if you are flailing on a surfboard, but if you are mellow and want to share waves,....kayaking in the surf works too!
PM me if you are serious about going out in kayaks, I can steer you to the nice places. But ummmm, SoCal surf in the summer is warm .....and small. But always worth it!