If you think you MIGHT have to go back and forth it's just not worth it honestly. It's a lot of work to tune/remove then redo it all again for a quick visit, just to do it all over again.. Your best bet is to figure out just how strict your area is.. I've heard it going both ways, some places...
Hey Gary, the ETC one seems to be a number of reasons from the past posts here... I'd search around a bit, a ton of info around it... which is good and bad, the bad is it's a common problem with the ecodiesel. Welcome to the forum!
They are more prone it seems, but no year is safe! :D
But, I've said many times if you have to question it yourself and often think about it when driving, I would suggest a different truck. Overall, they all have issues but sadly the EcoDiesel has more then most it seems.