I would check if your wheel bearings are adjusted correctly. Jack the tire off the ground and with a bar under the edge of the tire, see if you can move the tire.
How much play do you have in the steering wheel with the engine off? Do you know if you have a TRW adjustable steering box?
Gas MH owners seem to like a stabilizer more than many DP owners. Based on 85K miles without one (on the same RR10S chassis) I removed the one on the new to me 08 Navigator as it made driving noticeably tiring... I still put in 12+ hour days. You can read more about it here: https://www.irv2.com/forums/f258/mak...le-451209.html