I purchased a "folding" ladder at Camping World about 12 years ago when I had my first FWC. I needed a ladder to reach the outer window storm flaps when the top was up as the camper was mounted on my 4x4 Ford Super Duty. It is a 6 foot straight aluminum ladder the hinges in the middle of the rungs, collapsing to 6' x 4" x 3". Extremely compact. I also used it when tying my canoe down to the Yakima racks in the front and rear of the camper. I no longer have the 1998 FWC but just purchased a Grandby Shell this spring and still use the ladder for access to the sides and front area of the roof that I can't reach from the folding rear steps.
Check this Camping World link for the free standing "step" ladder version that folds down to a size only slightly larger than the one I have. They may still sell the "straight" ladder version that I have, but not on line. I've gotten alot of use out of this over the years. It rides comfortably inside the camper on the window sill.
http://www.campingworld.com/shopping/product/compact-folding-ladders/2922
TK