The cache is at the posted coords, but the retrieval isn't "simple." Do yourself a favor and approach this cache from the Henderson County Parks & Rec Activity and Athletics Center parking lot off South Grove Street. Turn in by the sign and park at the top of the hill. If you ignored the towel warning but arrive at the right time (M-F 8:30 am – 5 pm or Saturday 8:30 am – 4 pm), you’ll have access to the restrooms - enter the two-story brick building at the “708/Office” door, then go upstairs to use the facilities if needed.
By the way: yes, you do have to do what you think! And you will need a towel.