Need advise on which new truck - 1/2 ton or 3/4 ton?

Since you're getting a hybrid, here are a couple of suggestions to be able to keep it cooler during the summer months, plus block out the light if your late sleepers.

Company called pop us gizmos makes bunk end covers to help shield the bunks from the summer heat and we cut and put reflectix in the bunk end windows, again for the same reasons.

Those two things alone will keep you about 10-15 deg cooler in the summer. We have a pop-up and it has made a world of difference for us