I had to look up a Roo 17'. I assume it is something like this: http://www.rvtrailers.ca/rockwoodroo/image...33_Extlarge.jpg
With this type of floorplan perhaps:
If so, you have a very nice unit, with a lot of room for a growing family. Remember the old saying, a bird in hand is better than just having a wish for one. Well, maybe it isn't that old since I just made it up. Twin axles, tandem wheels are really nice. Or is this more like yours with a single axle
Which ever it is, they really look nice. You have it, and it works for you. No sweat. Wear it out, get something else. Maybe a molder fiberglass one next time, maybe not. What works, works.
And you may have all of this now, already: Model 17
Length 18 ft. 8 in. (5.69 m)
Exterior Width 90 in. (2.29 m)
Exterior Height 110 in. (2.79 m)
Interior Height 76 in. (1.93 m)
285 lbs. (129 kg)
Weight 2,189 lbs. (993 kg)
Unit Dry Weight 2,474 lbs. (1122 kg)
GVWR 3,785 lbs. (1717 kg)
Tire Size 13 in. (33 cm)
Fresh Water Tank 31 gal. (117 L)
Gray Water Holding Tank 25 gal. (94 L)
Black Water Holding Tank 25 gal. (94 L)
Converter w/ Charger 55 AMPS
And only 2,474lbs empty and can reach a maximum gross weight of 3,785lbs.
And you more than likely have Fiberglass Exterior, which is in the right direction toward molded fiberglass. My son tells me, "mine is fiberglass". A huge 5th wheel Courgar by Fleetwood no less. ha! It does have Fiberglass Exterior on an aluminum frame. Not bad really. Pretty good in fact.
Enjoy it, you have it made. Good travels. Happy camping in your Fiberglass Exterior rig with expanding ends.
Only draw back would be in bear country, maybe.