There's no glove box on my motorhome (built on a '98 E-series chassis) either. I guess there is an awful lot of sophisticated truck stuff behind the dashboard there and there just wasn't room to put in a glove box. My subcompact Honda car, meanwhile, is clearly less sophisticated because Honda put in TWO glove boxes despite having so much less space overall.
I attached a 3M Command hook to the back of the dinette seat just aft of the front passenger seat, and hung a little expanding file portfolio with handles from it to store the registration, insurance card, and other important documentation (like campground reservations or receipts) that I wanted ready access to when needed.
