You are right about 5-ers not fitting in very well in some campgrounds. I had a 16' Viking that was the same exact floor plan as your new baby, and for the weekend campouts....it was perfect, I loved it.
But living in it for 7 weeks, this past winter when I traveled to Florida.....the smallness of the trailer didn't bother me, it was the smallness of the 1-door fridge!!
So as soon as I got back to Ohio, I traded my 2013 16' Viking, in on a 2013 21' MiniLite.......ouch I took a $2500 loss, but I needed a 2-door fridge. I got tired of frozen heads of lettuce!!!