Denny thanks for the input...to answer your 2 questions I was originally going to just tab the front floor piece down since the sides have a fair amount of solid contact. However your comment gave me and idea and what I will do is bond a cleat down and then attach the front lip to the cleat and then tab.
See pictures below.
Front Lip of floor
Cleat
Tab and bond
As far as the flotation where the noodles are very little usable space. However after all the rod holders,cleats and etc. are installed I will cut up a few more noodles and put them under the gunnels....another good idea. Also there should be a ton of space under the rear cap.
With that and hopefully a couple half full tanks the boat should not go to the bottom if a disaster happens.