I'll "just" be using LT (Light Truck) tires. Trailer tires generally have a fairly rounded crown without much, if any, side lug on the shoulders. This is so that on multi-axle set ups they tend to scrub less in tight maneuvering turns; which is a tendency for multiple non-steering axles. Typical trailer leaf springs are short in an attempt to keep multiple axles closer together, which also helps minimize scrub.
They're also designed to use high pressures for relatively high anticipated loads, and are expected to sit unused for long periods... both supported by very stiff sidewall designs.
But for our needs... i.e. single axle, relatively light loading and desired low ground contact pressures for soft terrain... knobby AT tires will work just fine. Longer automotive or light truck leaf springs of the proper load rating will provide a softer ride, too.