Trip out west, YNP, Glacier. Which cell booster to get?

The basic capacity of the "local" towers in the "wide open spaces" might not be enough to support much streaming.....if any.

A "booster" won't increase the bandwidth available.
And it won't help anything if there is no signal there to "boost".

There aren't many situations where a booster is really worth the investment.

After the initial shock, the whole family might benefit from a few days free from the electronic umbilical cord.