Best lightweight options for popups travelling with minivan?

While I'm not gonna comment on a brand specifically, I will make some suggestions on things that you will need.

The bunk ends will get hot, so you will need to get some PUG's (pop up gizmos). The are a reflective material that fits over the bunk ends to reflect sunlight. PUGS

You will also need some Reflectix to go inside of the bunk end windows and possibly under the bunk mattresses if you will be parking on a concrete or asphalt surface Reflectix

** Spend some time on You-Tube regarding these products **

A robust air conditioner

At a minimum 2 small fans to blow cold air into the bunk ends

Possibly a dehumidifier