I have an ARE on my Tacoma. I recommend the opening side window option. It's great when retrieving or placing things deep in the bed.
I was having a horrible dust problem but bought a gasket that does a decent job at sealing around the tailgate. I then went to Lowe's and bought some weatherstripping and placed it on the inside and at the bottom of the camper door which seals dust out there, too. it's not perfect but it's a whole lot better than before.
