I have held off on doing the slide out drawer at this time. I added another shelf to my rear platform/storage setup. I have had a few unforeseen issues pop up that won't allow me the time to make the drawers the way I want. Also, I already see a redesign in my future, once u get back from Utah of course. I also was able to get a campmate and based on dimensions given to me by my brother who secured it in NorCal, it seems the Coleman may actually Cyr in the top compartment. I think I will be going with these $28 slides in the end however.
Thanks to everyone who offered opinions and sources. Before I head out in two weeks I will take some pics and try to start a build thread.
Nick