What suspension upgrades have you made to Kodiak chassis?

[Hotdogwater]

We are planning out summer x-country trip and I was looking to make the trip more enjoyable in our 06 34' Endura Kodiak chassis. I have read about the airbag systems everyone is putting on the SN but I haven't seen much on the Kodiak chassis. Anyone have experience here? Suggestions?

We have a bit of sway now so I am worried the bags will add more, but maybe the ride would be more enjoyable and not matter?

Have a ton of road noise, and even did dynamat lining of the cab but if the shocks up front and bags in the back make a difference in handling and noise I might be on for that.

I tow a 28' race trailer at about $8-$10K and the trucks passing us on the highway will push and pull me all over the place. Sometimes getting to the race is way scarier than racing.

Thanks in advance for any advice you can offer.
-Daryl