I've used SRW for years, mostly because of getting around in the fields. I began to realize just how over weight I was , and we hope to buy a longer Lifestyle then the 2011 Cameo 31 ft. The Cameo had the SRW overweight. Went to a dRW F350 2014. We broke it in driving to Memphis Tenn. from the Amarillo area. (not towing). Was shocked how easily it handled. Hooked on to the trailer and was very impressed. We've had it all over towing and not, and very glad I made the change. As far a DEF. I've had 2 now that use it and it's not a big problem. More and more stations are getting dEF pumps, and you can get the jugs all over.