After almost thirty years and 120K miles, the front springs on my '74 Argosy 24 were about shot. They were quite rusty, and I had a really saggy front end that was only partially cured by higher airbag pressures.
My solution was new front springs:
You can buy different strengths depending on the front end weight of you motorhome. They're not cheap, but if you're refreshing everything else in the front end as I did, it's a logical step. Now the front end sits up where it should, and the ride (with Bilsteins) is superb.