There's the new Suzuki Jimny, which is excellent over rough terrain and features a low-ratio gearbox. It's quite light, though, so not the most capable tow vehicle, and actually finding one might be difficult - it's got a very long waiting list. Other than that, there are very few small SUVs which are capable off road. You might have to look at bigger cars - the Toyota Land Cruiser would be an excellent choice, but it's expensive. Alternatively look at a pick-up truck like the SsangYong Musso with its seven-year warranty.