Thanks for all the input folks. Raising the floor is too much hassle. Some of you caught the fact that I would want the front dinette to be a permanent bed, so the measurement from the floor would be to the top of an 8" mattress on top of the base of the seats. This would ideally be a total of 16 to 17", meaning only 8 to 9" for the storage portion. It might turn out to be an impossible dream. I might just build a portable single step platform.
Once I actually get the trailer and meet some if y'all, I will be more than pleased to start pouring - I won't even force anyone to listen to my health history, but I might urge a single malt on you. And isn't talking beneath the stars part of the reason we all do this?