I have a KORE system on my truck. I just put the Ride Rites from Firestone on my 3500 dually. It was a very easy install. I had a set of custom bags but they were not working out. I am using them for the same reason you will be.
I tow heavy and with the levelling of the truck when empty with the system, I can tick people off in the oncoming traffic when towing as my lights pitch upwards. With the air bags I level off real nice.
I have the two valves mounted at the back between the tailgate and the Road Armor Bumper... out of the way from debris and easy to get to. I am using a 12 volt compressor for tweaking the air in each bag but I will use something bigger when I air up to about 60-70 psi when towing.
Always keep at least 5psi of air in the bags.
Scotty