Welcome to the Truck Camper Forum.
In the room is an elephant that I cannot ignore.
Because you did some research, perhaps you are aware of how the weight of your camper compares with the payload of the Tundra. If not, I think we on the forum have a responsibility to bring up the subject.
Last time I checked, the payload of a Tundra was about 1500 lbs. The published dry weight of a Lance 945 is around 2800 lbs. Then there are passengers, cargo, water, propane, etc, maybe 500 to 1000 lbs. And then there's the tongue weight of the trailer. Plus, when you weigh your rig, you will probably discover that everything weighs more than you expected.
If you're OK with those numbers, so be it. The decision is yours. But I would feel remiss if I said nothing.