in the end it depends how much weight you have on the back end.
I have a 2007 quad cab Taco, and load that bed pretty heavy so between that and the tongue weight of my 16 foot V-nose tandem trailer there is a good deal of weight on the hitch.
I ended up getting airbags to help level it out, I don't have much air pressure in them, but it does help a good deal.
I pref. having more weight in the truck than the trailer, and the weight distbrution hitch can transfer energy to the truck so I'm more secure with those air bags there.
Spot
As was mentioned earlier, even with nothing in the bed and no trailer the back ends sags on the newer Tacomas.I run my air bags at 5 lbs for a unloaded truck and it levels it out perfect.
