Suspension on camper.

All depends on the length of the spring leaves.
If the leaves are short sharp highly curved springs as on the vast majority of trailers then they don't have any of what could be called "ride quality".

If the springs are longer and more compliant in their action then the ride quality will be better and the addition of the airbags will give some load carrying ability combined with a higher ride.
The spring initially will give a softer/compliancy to the suspension but as the bag compresses the "rate" of the suspension action changes and becomes harder where a spring retains its spring rate. So it becomes a combination of the two mediums.
Ideally longer springs, still with the ability to retain the desired ride height and also with shock absorbers to dampen spring action will give the best results.

Adding longer shackled springs,if applicable is fairly easy and gives the largest degree of ride improvement.
You may be better to upgrade the springs/with shockers and forget the airbags.

There is an immense difference to ride by adding shocks. Some will say you don't need them but most vehicles have them for the same reasons a trailer benefits from their use.

hi capnbazza
just be carefull if you add shock abs to a trailer just be sure that the chassis frame of the trailer is strong enough to take the constant pounding that the shocks will exert onto that area or you might find cracks in the chassis will appear and /or the chassis might break
i would suggest welding on additional suport plates or gussetsand the same may happen with the addition of airbags
just my thoughts on it

No. Airbags will simply make it ride harder.
Simple way to soften the ride on tracks is to let some air out of the tyres.

Does the camper really require 7 leaves? i just changed to 5 leaf from 7 leaf at 750kg per spring on my off road trailer. ride is smoother compared to 1100kg per spring previously! Michael