Fair enough.
OP; what size/model of camper are you considering? The size/weight of that may dictate what kind of additional payload accessories or modifications you'd need.
Thank you. I didn't realize how difficult it would be to get info specific to the question asked. I had hoped, given how knowledgeable readership in this HD forum is, they would have a fair understanding of all components of suspension, not just airbags.
So to answer your question succinctly, after following the advice of those much wiser than I, I selected a camper first, then bought a truck that could handle the weight. My load sticker is 3610, which is close to the max for a 2500, bought in May of last year, but due to covid, didn't get to see the unit I wanted to purchase until Jan. And was really disappointed and even though the weight was perfect, I passed on that purchase.
So not really knowing the exact weight of the camper I couldn't pass up, and half believing the dry weight sticker, I bought it. The bottom line is that I have a 4200 pound camper, wet weight, and my cat scale weights show im heavy 520 pounds on my rear axle.
I put timbrens on first and want to keep it that way, while failure of a bag or line in most applications requires a simple fix, it could be disastrous while overweight. I've seen enough airbag failures to know I dont want it, and the amount of pressure needed is not something I think is necessary.
In addition to being overweight, my front axle has lightened 300 pounds with the camper on.
So...I purchased vision 19.5 wheels which exceed the 3000 lb stock 17 inches I have, I also bought h rated tires which also have a 4000 pound rating. So I'm confident that my tires and wheels are rated higher than my load.
I also noticed the bump stop in the front of my camper is huge and will cut that to fit my truck, allowing my center of gravity to move forward almost two inches. I will also gain a physical height of an inch and a quarter from the bigger wheel, increasing my rake, which I hope will transfer some of the weight forward onto the front axle.
I'm not too concerned right now with sway, going up a driveway results in more side to side than I care for, but I realize I have a high center of gravity from several factors, all with the type of camper I have.
Which leaves me with coil springs. I'm not necessarily looking for more height, rather something thats not going to let go at the worst moment. Its been challenging to even find out what the weight rating is for stock springs, if they even exist or are measured as such. Most of what i can find in aftermarket weight ratings add up to less than the 6000 pound gawr. So is the rating for a fully compressed spring? Can someone explain how weight ratings are arrived at? Next is cost, supersprings are 600 bucks, while cargo Maxx and Daytons are a third. Why the price difference? Lastly, progressive or linear?