LOL TCH,
I can't imagine going through all of those gyrations just to get a few extra mpg. I drive the living crap out of my Prius and still average 45 or so and 47 on trips. I recently come back from a 3500 mile trip and averaged 47.06 measured and that was at interstate speeds between 75 and 80 with the AC on 100% of the time. If you are familiar at all with Ca. we have several long hot and steep grades in the area, one from Las Vegas to Baker Ca. , I pull that hill in the left lane at 80 just to stay reasonably close to the speed limit, I have touched 86 just to prove a point and there was still some left. The battery is down to showing no charge left 2/3 of the way up and the Prius keeps right on chugging at 80 on the engine alone. All this and I still average 47 on the road or better. Of course, I am not saying you are supposed to get Prius mileage with a Camry but if I owned the car I would enjoy the extra mileage afforded by the hybrid system and forget about opening the door and pushing with my foot. JMO
About batteries, with reference to climbing and worrying about battery run down, in a word, don't! The car is designed on the concept of what goes up must come down. Use the battery for climbing as much as you need to, that's what it's there for. When you descend on the otherside, the battery will recover by the time you have reached the bottom of the hill and the regenerative brakes will help do it all free of charge with no mileage deficit from the climb. The computer keeps the battery from charging over 75% and discharging to less than 45%. The battery has a very easy life. You won't hurt it.
I drove like you do for about the first two weeks of my Prius ownership. As I recall I got about 52 mpg measured. Then I started driving the car normally, it was much much better, a little less mileage but still great mileage.