fish-hunter
Quarry Creeper
If your worried about maintenance I'd go brushless. The roc412 1200kv motor would have plenty of slow speed crawling with plenty of torque maybe even the 1800kv version. They are easy to waterproof and no brushes to worry about burning up. I've been running a 3100kv roc412 for 3 years. It's seen everything from being completely submerged in a creek with water running six inches above the entire truck to super sloppy mud, tons of sand and plenty of dirt. It's been in 3 different rigs and always ran on 3s. If I were to try another brushed motor it would definitely have to have the checkpoint style round brushes. They seam to be the only brushed motor I've seen take the kind of abuse I would put it through.