20 mile run tomorrow

I have been sitting here at my computer this morning for 45 minutes trying to map out my run tomorrow. It is easy to figure 20 miles. It is harder to try to figure out where I can get water. I am basically going to take three runs all starting and ending at my house . .when the run ends, I will re-fill my water. I will have the water sitting outside so I can re-fill my bottle fast  . . .I have learned that when I stop, starting over is almost like learning how to run again. I have once again been reading too much about "hitting the wall." When I was younger, EVERYTHING about me was full throttle - - -now I seem to be somewhat cautious and obsess over things. This week has the been the first week where doubt has crept in. I have this story that keeps playing over and over in my head where I pull myself out of the race at about mile 22. Would like to say that I don't ever have self doubt but that wouldn't be true . . .and that wouldn't be fair to "running" because running is one of the "truest" things I know. I am going to drink well over 100 ounces of water today and fuel myself with "slow" burning energy (apples, yogurt, oatmeal). I weighed myself and I am at 174 pounds. That means that I am only 4 pounds away from my goal. Surprisingly  I don't really feel like I am in very good shape. I think alot of it is that I have not been working out (except 30 pushups after every run) and as a reult my chest and arms aren't very strong. Let's put it this way, GQ won't be knocking on my door anytime soon. I am going to once again buy my GU today and anxiously prepare myself for the beating I am about to take tomorrow morning!