400lbs x5 = 2000lbs. Trailer weights vary wildly, but might possibly be up to 1000lbs.
Still a 3K trailer package is well within the realm of a V6 tacoma. That would be stretching a 4 banger 5 cyl a bit.
So, if you're having trouble, I'm guessing you have a loading problem.
Pile all 5 of those on or in front of the trailer axle, get your tongue weight up around or over 1000lbs, and you'll be nose-high-to-the-sky, with ride, handling and control all shot to heck!!
Once the trailer is loaded properly, the other thing that helps big time is trailer brakes. One extra axle and two extra tires getting into the braking equation makes all the difference in the world. A loaded trailer compounds the natural weight-shift that happens under braking, shifting even more weight onto the front wheels. So it's pretty easy to put on the brakes hard and end up locking the fronts early, and sliding into whatever's most expensive.