Looking at Floor Plan along with Wheelbase begins to illustrate the problem. If Floor Plan is Rear Queen w/ or w/o Walk Around and/or Slide, a pretty-much-standard rear overhang and corresponding weight is going to be behind the Rear Axle. If the coach is over 30-feet, then there is enough house in front of the axle to offset that heavy rear overhang and put a respectable portion of total vehicle weight on the Front Axle.
Long Wheelbase WILL track better than Short, but the Loading still has to be right. And of course the Alignment and Weight Distribution have to be right.
Take this 29T to a Truck Stop. Set FRONT tire inflation to 60 and REAR to 80. Take it across the CAT Scale and get the Weight Slip. Drive it again with those tire pressures, see if it handles any better, and let us know what your weights were.