Since it is winter in many parts of the world, post a few pics of your sled and/or your sled with your Tacoma.
To eliminate buckling of the tailgate I fabbed up a little false floor platform that enables you to store some loading ramps underneath. A trailer doesn't really fit my needs as I live on a very large hill and backing it into the driveway after a run would be nearly impossible.
My 2005 TRD Off Road has the leaf TSB done in addition to some Firestone air bags installed in the rear. 5100's up front set at 1.75". I only inflate the bags to 35 psi or so even with the weight of the platform and sled in the back. Bags are rated at 100 psi max so lots of leeway left. The bags are well worth the money and prevents that sagged out look while running lots of weight in the rear. No problems to level to stock height or a height to complement the 5100's up front.
Pics show my winter steelies as well as the smaller 245/75/16 ice radials I use in winter. Color keyed grill also removed to avoid rock chipping from heavily sanded roads.