sounds like it could be a fuel problem. Have you checked your fuel relay? Fuel filter? Fuel pressure? I had a similar problem with a car I used to own. I would drive it and turn it off, then when I tried to start it again a while later, it would not turn over. I also had to wait for it to cool down completely.
As for the ckp, I do not know of any other location other than the 7 o'clock position on the front of the engine. Are you looking in the correct area? On my 02, you can see it and the connector by just looking down at it from the top of the engine bay near the bottom of the engine. If you look at the front of the engine from under the truck, it is right behind the crank belt pulley attached to the timing chain cover. It's pretty hard to miss. Hope this helps.