Base curb weights are for base model trucks. No one buys the XL/Work/ base truck with no options and I believe no fluids. That's why it is best to focus on the Tire and loading sticker which is GVWR - as equipped truck and full of fluids/gas.
OP, toy haulers and half tons are a tough mix. Most travel trailers have 1000-2000 pounds of payload or what the RV industry calls cargo carrying capacity (CCC). This is adequate for clothes, food, cooking gear, toys, etc that RV owners take for long weekends, maybe a week. If you need to carry toys plus typical camping gear, then the frame will be stronger so the base weight will be higher for the same length. Another difference with toy haulers is that most are designed to carry the extra weight of toys behind the trailer axles. So the dry tongue weight is typically more than 15%. It can be tricky based on what the toys are and how they are loaded to lower the TW percentage over dry. That Lance isn't too bad, actually. I've seen 20% dry for some similar TH models.
Still, 7k dry, 1000 pounds for RV stuff, and how much for toys is more than I recommend for half tons. The receivers are rated at 1220 pounds max, and your payload is with 1200 pounds of TW is also limiting.