We're planning a trip to Moab this spring. I have an Explorer and a Jetta TDI. The TDI gets about 3 times the gas mileage of the Explorer but has pretty low ground clearance. Gravel roads would not be a problem but I am wondering about getting in and out of parking areas. Do I need the ground clearance of the Explorer? Are there any must ride moderate difficulty trails that this would prevent us from getting to?