What kind of noise are you dealing with?
If it is getting stiffer with use, it sounds like the hinges are getting road dirt and grime in them.
As they get dirty, they get stiffer and noisier.
Try some lubricating them silicone spray. Give them a good blast, swing the door some as you are spraying the hinges so the lube can work itself in. Let it sit for awhile, then give it another shot.
Our old Airstream was bad for grinding and groaning as the hinges got dirty. It became one of the routine maintenace items that I do a couple of times a year now.
When I was a kid I was going nowhere fast, now I'm an old man I'm going everywhere slow.