I've got a 2015 Ram 1500 Eco diesel/6.5' bed, 4x4, with Pop Up camper on the bed. Weight of camper and gear is 1,000 lbs. Can you offer an opinion as to what would serve me best: lift kits or air suspension systems. I need to level the truck for heavy loads so I don't blind oncoming traffic at night. Thank you
You need what is commonly referred to as a load leveler system. There are several systems out on the market, such as the LoadLifter. There are several different types. The one I think would help you out the most is one (like mentioned) which will provide extra lift when there is a load on the vehicle.
Basically, there's a two way switch. When the suspension sags enough, the truck hits the switch (automatically) which activates the pump which inflates the springs, bringing the truck back up to its proper ride height. When the load is then relieved from the truck, the other side of the switch is hit, releasing the air, which brings it back down to the proper ride height. It's pretty slick and all automatic.
There are other kits which just provide extra support as the vehicle drops. These aren't as slick as the one I mentioned, but are a lot cheaper. You don't have to do anything with them, either, but the suspension is at the mercy of the helper spring.
The reason you don't want to use a lift kit in your situation is because it will only provide lift. It doesn't support anything. It doesn't provide any extra capacity. You'd still have the effect of the back end sagging. These kits are best used for aesthetics or when you need extra clearance for taller than stock tires and/or off-road use.
Some vehicles are factory fitted with auto-leveling headlights, but you might consider retrofitting your truck with a kit. It seems a lot cheaper/easier than messing with the suspension if all you're trying to accomplish is headlight beam adjustment.