I also tow a Jeep Wrangler with my RV. I think you'll be fine with the 2" rise. Maybe take a couple short test runs just to be sure, but I doubt you'll need a riser for it. As far as the EZ pass goes, I have an EZ pass on both the RV and the Jeep, but as far as I can tell they only charge me for the RV. However, they do charge a hefty toll, probably comparable to what an 18 wheeler pays.
Jeff & Kris
2016 Foretravel Realm & 2014 Jeep Wrangler