Tandem or single axle

As of now I have 4 trailers, 3 single axle and my dual axle TT .

I would like to have 4 tires on the ground while towing a TT .
Crosswinds and bow waves from overtaking trucks , seems to handle it better but that might be because of the WD hitch and sway bar, not really sure.

Dual axle : To support weight , to track straight that offers a little security over just 2 wheels. Think about a flat tire while in motion.

It seems to me that the single axle trailers i tow, jackknife faster than the dual axle while backing. Backing the dual axle, seems to take less effort.

just want to clarify. backing up a single axle seems more difficult with the more narrow bodied single axle. A full bodied TT should back up easily because you can see it in the mirrors. Tire scuffing while turning will be less with a single axle.

The single axle rigs will probably all be about 3500 GVWR. You will be lucky to find one that has much payload left, especially if you intend to carry water. Some are as low as 300# of payload, which is nothing.

At least with the dual axle setups you should be able carry a decent amount of stuff. Plus you will probably find they have less tongue weight because they dont need to offload so much weight from the axle and onto the tongue.

Years ago we had a single axle, now we have a duel axle setup. The reason for the duel axle was because of weight. Both pull and back up easily.