I am assuming you have V8 4Runner... The V6’s, even with the weight distributing hitch don’t go that high.
Some people on some other message boards seem to have good results with the proper setup (weight equalization hitch, good tire pressure etc). What you mention is true. As a general rule the longer the wheelbase the more stable a towing platform you'll have. (Width has some effect but not as much as length.) Good design, as our 4Runners have, can go a long way to minimize the effects of the comparatively short wheelbase. The other thing that helps a short tow vehicle is proper balance. An improperly loaded 2500lb trailer with 700lbs in the car will tow far worse than 5000lb load that's properly balanced. Once again, the long wheelbase vehicle is better, in part, because balance issues don't have as dramatic an impact as with short vehicles. You can NOT load or equip the 4Runner (or any short wheelbase vehicle) to be as stable in high winds as larger & longer tow vehicles, simple physics...I have towed up to 3000lbs so far and my V6 is amazingly stable for such a short car, testament to Toyotas' suspension design and calibration. From reading on the other sights I am blown away with the size of rigs some of the V8 guys tow (and their satisfaction levels.) Good luck! :chug: