With the current (January 2021) COVID restrictions, if I bring my pickup truck, are we allowed sit in the bed in the back to watch the movie?

Yes you can sit in the back of your truck.

Yes, there were people there doing that, and was enjoying the movie.

I saw people last night backed in watching the movie from back of SUV's tailgates up. So I'm sure you can watch from your truck bed. It's cold and kinda wet right now with our strange weather.

I believe so 👍

Yes you are, I've seen others do so