They are indeed heavy but not just "crazy heavy". A 3/4 ton truck would be a minimum unless you bought a little one like the 18' models.
The walls are FRP (fiberglass reinforced plywood). That means strong and heavy at about an inch thick. The amenities are nice inside but nothing as fancy as the other mainstream toy haulers.
I race ATVs in a cross-country series. The camping set-up is out in some field and basically "run what you brung". Bring your own water, power, etc.. We used to have a big Cyclone. It was fancy but something broke on it almost every weekend. We sold it and bought this 30' Work & Play. Its been awesome. A few minor issues but for what use a camper for, its been the best thing for it. But once the racing life is over for us, it'll be sold and we'll get something like an XLR or Momentum.