Single axle are not that bad if you are driving within your and the trailers limits.
That's the key, know the limits of the trailer, and tow vehicle. All my hitches are 2-5/8" Bulldog hitches, and I use torsion bars, and anti-sway bars if needed. All my trailers, even those under the weight limit, have electric breaks, and full breakaways. I buy the best tires I can, and check them regularly on tow trips.