If you use your truck for towing a lot then a compressor would be very nice to have. Since you are only using it 10 times a year I would opt not to have the compression.
My previous truck was a 2004 Ram 2500. I bought a toy hauler that was a little too heavy for my payload. After I added the airbag I was able to level out the load in traveling was normal again. When I was not towing (the majority of time, not miles) I would run with the air pressure set at 8 PSI. This kept the axle off of the leaf springs and gave a nice soft smooth ride. When the toy hauler was hitched up I would run it 75 PSI, it kept the trailer perfectly level. If I had my Harley Davison loaded in the toy hauler, I would run it at 55 PSI to maintain level . The extra weight of the Harley on the rear of the trailer created less load on the hitch.
I mounted the air valve on the bumper next to the license plate. This made it very convenient to pump air in or out since I have an air compressor in my shop. This became a normal routine before and after each trip. In my opinion I would not pay the extra money for the compressor. If money is no object go ahead and get it. But it is not necessary.
If you have to ask why I drive a Diesel, then you will never understand.
2016 Ram 3500 DRW
Cummins(370/800) 68RE Auto 3.73 Rear
2018 Momentum 376TH