First off, welcome.
Next, you need to be aware of which forums you are posting in. This is definitely in the wrong forum. But I have asked the moderator to move it for you.
As to getting the trailer higher in the air? and that after all is your question.First choice is what is called flipping the axles. Which involves welding new spring perches in top of the axles and installing new ubolts with the springs on top. Next in order is moving the springs down one or two holes in the hangers. If your trailer is so equipped.
The problem with adding air bags as I see it is, you would place undo stress on the rest of the components. I think I would look at the first two options, then consider new spring packs with a bit more arch to gain some height.
Remember now, towing nose high by an inch or so is not as big of a deal as you might think. Now, towing 6 inches nose high, yea that is a problem.
