Larger percentage of towed trailer weight needs to be in front of the wheels when loaded. Are you within the weight on the MH hitch? If not, are you using a weight distribution hitch with sway control? Even if not a trailer that long should have a weight distribution hitch with sway control damper IMHO.
Next are you within the weight specifications for your MH towing? Front axle weights, rear axle weights when loaded? Shocks old? Steering damper old? Tire pressures correct for loaded weights?
Lots to look at. But you need to be serious about finding out if you're within weight limits and loading, both trailer and MH.
What type of motorhome are you pulling with? Year, make & model?