I haul our offroad 2004 Wrangler TJ on a 18' open car hauler. 16' deck, 2' dovetail. I haul it in case I break it! The dovetail is nice because I can haul other, much lower, vehicles when needed. Plus it's very handy to haul all sorts of other stuff that will not fit in a pickup.
We flat tow our 2016 Wrangler JK 2dr.
Both behind a 30' Holiday Rambler V10 gasser. Honestly, I can't tell the difference between the two combos on power or gas mileage.
Both have their advantages, and disadvantages. With the trailer, I can back up if I get into a tight situation. No wear and tear on the drivetrain when trailering. But, it takes up a lot of room. Luckily, at off-road camping events, it's wide open dispersed camping with tons of room.
Hooking up the JK to flat tow takes minutes compared to loading and strapping the TJ on the trailer. So much easier to deal with in tight forest campgrounds.
If we get rid of the TJ, the trailer will go too.
2005 Holiday Rambler Admiral SE 30pdd
2020 Jeep Gladiator Rubicon - Maximus-3, Blue Ox, RVi3, Cooltech
1993 Reinell 20' 5.0l - good old boat