I use a Garmin RV 785 & traffic with life time maps. I purchased this from Garmin to insure that I had lifetime maps.
The unit can be toggled between car and RV. In the RV mode is were you enter the trailer data to insure that there are no surprise when driving. Such as height, weight, length, number of axles and propane tanks.
This is a hands free device which is voice activated once the device is powered up. You simply speak to the device such as view maps, saved places find cities and so for as you drive.
I have had great results with my Garmin. Before the Garmin I had a Rand McNally unit in the past but it was not as sophisticated as this Garmin is.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 145K+miles