I've replaced one air bag on my 2000 Dynasty with S series chassis. It was the one in front of the rear wheel and by far the hardest to access on my coach. It's not a difficult or complicated job, but it does take some physical strength and stamina along with some mechanical ability and an assortment of tools. I needed regular wrenches, stubby wrenches, and sockets with several extensions and different size ratchets. Here's the thread:
Here's the link to Firestone's air spring guide:
It's my experience (limited though it is) that Monaco used two air springs--a W01-358-9376 (page 15), which is a reversible sleeve type and W01-358-6905(page 104), which is a convoluted style air bag. The W01-358-9376 looks to be used where both air springs are the same front and back, and a combo of W01-358-6905 in the front and W01-358-9376 in the back where they are different.
You should be able to read the model number of the air bag on the side of the air bag itself. It's a little difficult to see when the air bag is on the coach and depends on the orientation of the bag itself. The reversible sleeve air bags can rotate 360 degrees on the mount so it could be facing any direction.
There are a lot of threads on air bags here in this forum, click on the search this forum and search for "bags" or "springs".