A cast iron griddle can be better than other materials, but this all depends on what you expect to get from it. Cast iron heats evenly, becomes more seasoned with use and extra care, and is nearly bullet proof. Rolled steel is just as tough and also gains non-stick seasoning with use, but the thinner construction heats fast and can have hot spots. Stainless steel is often coated with a non-stick surface like teflon, making clean up easy. But camping conditions can be tough and applied surfaces can chip with use. Aluminum heats fast and is the most light weight, but it can have hot and cool spots, making even cooking difficult. But if you’re looking for a durable griddle that will last you for years, and you don’t mind the extra maintenance that comes with it, cast iron might be the way to go.