Air ride in a class A makes a big difference in swaying over a spring suspenstion.
Sure but you can't get air suspension unless you go diesel. And you won't find anything less than 35ft in a DP that you'd want to own.
Two of my friends have a 1992 and a 1994 23' Winnebago with 454's .
They love it .
Heck hey and they get 13 mpg or better. I know I rented one from cruise america when they had A's. 13 mpg with the 28', up hills from phoenix to flagstaff. And the mountains didn't slow it down at all. Spent $100.00 in gass and went 1300 miles. I couldn't get 13 with my 79 dodge with a 318.