Summarizing, line up your axles, put at least 15 percent of the total
trailer weight on the tongue, and tow as safe as you can steer and stop.
Sway should never be a factor.
--
Jim in NC

I'm certainly not an expert, but I've never heard a recommendation as
high as 15% of gross on the tongue. My Komet single axls has a squeek
under 10% (175 lbs on the tongue, 1,876 gross), and is rock steady at
all legal towing speeds (and well beyond).