Mr Wayne> I have a 2012 v6 crew. You can't detect the cylinder deactivation at all, unlike my wife's 2008 Honda Odyssey with the same feature. The Honda "growls" and runs a little rougher when the cylinder deactivation icon lights up. Dodge did a good job implementing that feature.
Also, the 2012 pulls a boat that size just fine. The 2014 models will only be better with the new 8 speed.