Never thought about the thing Scooby mentioned re. noticing a blowout..."I think there is a better chance with single axle that the driver would notice a issue with all the tires on one side, pull over and stop before the tire beats the snot out of trailer."
That could be important....When I had a blowout on a tandem-axle trailer on I-10 in the Arizona desert, I didn't realize it until the tire was shredded (trailer feeling strange, and people passing me pointed)....drove on the shredded tire long enough to ruin the wheel and, more importantly, it tore the bathroom floor and ripped the water intake line...had to get a slapdash repair in Las Vegas to be able to continue the trip
This issue is probably not enough to move me into a single-axle by itself, but kind of counter-balances the concern about a blowout on a single causing the trailer to tip and possibly yank the truck around
