How about rrunning with the back window secured to the top of the spare tire. I've seen it done and tried it. I like it. With the tops off and the windows down it's pretty nice, lots of air flow and quieter than with the window closed. Opinions?

 

I have done that for my dogs in the summer, cause I have no AC.

 

Doesn't look like you'd need a/c. Do you have summer? :-) Tx for the response

 

I just leave mine open. Don't see a need to secure it unless the going is really rough.