Wheelbase is important. All things being equal, a longer wheelbase will handle better in crosswinds and wander less(esp. if you are towing something). We started with a 32' Winnebago Adventurer, it wandered a LOT with the Toad on back... the tail wagging the dog. We graduated to a 35' Adventurer(adding 20" of wheelbase) and the improvement was like night and day. Now we have a 40' DP(adding another 40" of wheelbase and a lot more weight), and it tracks perfectly with the Toad. The tail overhang is not as long, and with the increased wheel cut(56°) is more maneuverable than the 35' gasser.
And CCC is important, some M/H have less than 1000#, while others can be rated over 4000#. We're snowbirds, and I didn't thank we hauled a lot of stuff, but when we put the M/H on the scales it was over 1500# of stuff. In some M/H we would be overloaded. IMHO.
Kent & Sue & Pecos
2010 Allegro Bus 43QRP
Formerly 2004 Itasca Horizon 40AD