Own a 2000 K2500 ext cab long bed 7.4L auto I was given a old 19' Holiday Rambler camper. Truck squats when it is hooked up. (Might need new rear shocks too?) I dont know what I need. Do I need a weight distribution hitch? Or can I just get a RAS system? Do I need both? Not sure what the tongue weight is. I installed a trailer brake sytem and it pulls pretty good, but I haven't taken it on any long trips. What do you suggest?