Curious if anyone has previous experience shooting sprint car racing? If so, what gear you've had the most success using? Conditions would be a dirt track with large amounts of dust and exhaust fumes during the race. Evening into late night hours under stadium lighting. Flash is acceptable to use by the photographer. Race will continue during rain unless track becomes too wet and then will be delayed or cancelled. Would be shooting from a pit area and may possibly have use of a elevated 6-8ft high platform. Wondering if this type of shooting it might be best to have a designated camera and lens that is up to withstanding high levels muck and grime?