The best muck truck I've had was a Silverado, limited slip rear, 350, automatic. A really good natural mudder. I prefer a pickup, easy to hose out the back. When the Ticks and fleas figure out their ride is dead and disembark trying to find a new host, having them outside is a plus. The down side is I broke the tranny four times, bent a valve, blew a head gasket, three radiators and an intake manifold gasket. That truck stayed broke.
My Cherokee is way more reliable. Both my Cherokees are on their last legs though, salt, rust and neglect. Not real good in the mud, they won't go places the Silverado would.
My lease now is on a hill so I can get away with something less purpose oriented. My last lease was mostly a Creek flood plane, a lot of muck, peat bogs and places to get in trouble. Two or three times a year I'd have to walk out and go hunting for a friendly farmer with a tractor.