I can help, yes the maps will show the actual trails and they will be numbered too. And, for a place to stay, there is the Grand Vista Hotel, which is at the 3-way stop at the end of Howard Baker Hwy. And, your sister and husband should be ok om Brimstone as long as they dont get into the real deep mud holes. Since the trails are also gonna be rated on difficulty you may want to consider taking a "Blue" trail which is for a moderate trail. And by the way, the hotel is only about 5 mins. from the huntsville trail entrance.
Call us at the Brimstone Office and we will try to assist you in any way.
423-663-4868