xlinkrider,
I think you are on to the right method. I would think if you are going to hide and lock up your bike for a few days while off on a backpacking and climbing adventure you will want the rig as simple as possible so as not to leave easy or valuable things for folks to steal off your bike. Of course one method would be to ride in to remote areas on the bike where no one is likely to be where they would find it.
One word of advise. While on the bike riding stages of your tour you won't need to take much food. Maybe a day or two's worth because you can cover so much ground on a bike you will always pass by some kind of store or gas station. Then you can stock up for the climbing sections of the tour with more food when you near the backpacking sections. That will save you a lot of weight.