As it is raining today I have a couple of questions Can you see the screen in the rain and can you leave your vehicle running to keep the window clean and power the tadio

Yes on leaving vehicle running. As for seeing in the rain depends on how heavy the rain is at the moment

Yes you can leave the car running and as for seeing in the rain as long as you get close to the screen and the rain isn't real heavy.

I second Saul's comment. The only thing to add is they do not allow diesel or other loud engines to remain running. As far as being able to see, if you get their early and park in the front row then you should be able to see fine in the rain unless (as Saul mentioned) the rain is extreme but that is expected.