Got it done today. Thanks for all your inputs and suggestions. I've done this before, but thought there had to be a better way. However, I ended up doing it the same way as before. After lowering the pick up, I placed a 2' x 4.5' piece of quarter inch plyboard over the pick up fingers, turned the fly wheel until the front knife was almost fully forward, and squirmed into the knife area first on my back to grind the forward knife, and then on my belly to grind the stationary knife. Had to use my left hand/arm to grind the front knife and right hand/arm to grind the rear stationary knife. Not much fun as I barely fit. After reading about the possible difficulty of realigning the shims, there was no way that I was going to remove the knives from the bale chamber to sharpen them.
The rear stationary knife appeared adequately sharp, but I did a tough up on it anyway. The front knife was quite dull so I had to use a grinding wheel first and then finish with a cutting disk. Using a headlight and eye protection is a must. I started to attempt to squirm into the bale chamber but soon realized I'm not capable of adjusting my position once in the chamber, so not going in that way was a no brainer.
Good idea Aaron, but if you showed your wife those images, I hope you survived.