I use a 42" extension with my Everest, I started with a 48", but whacked off 6".
I would probably use a 30" with the Cascade,I like the hitch a little further back than some.
One thing about Host, is that if you don't like something or want something added or deleted they will do it.
I was at the factory in Bend a few weeks ago and looked at a Mammoth being built.I would love to have one, for me, the way the floor plan is makes it better for a single person.
I would have them deleted the fireplace and add a cabinet, and I don't need 2 TV's, especially the one in the bedroom.
Host's customer service has been excellent. While I haven't had many problems, most of which were user error, everything got fixed with no problem.
I had a switch for the dinette slide that was arcing and they they sent me one, took 2 minutes to install.
I was the guinea pig in 2011(2012 model) for their new drawer latches, they replaced them as they would not hold. I tore off the basement door because I left it open when I unloaded the camper and the door caught on the hitch, the replaced it for cost.
Just recently I was putting in the rear slide( I was not level) and the slide wobbled a little and tore off the awning switch, if I had been paying attention it would not have happened. Host is sending me a new switch for no cost.
The only other complaint is that they put the smoke detector over the stove,they don't do that anymore.