Wow, looks like an exciting workshop. I'm in Lakeland--Central, FL. I'd like to attend, but I'm not sure my schedule will permit me to. Judging by the images used in the ad, it seems like you really have a great handle on the process. I didn't realize that salt printing is capable of recording such a wide range of tonality.
You can obtain exceptional detail and depending on the paper used, very fine detail as well. In this workshop, for the sake of making it as simple for the participant as possible, I am using an Arches Platine paper as it is durable, lays flat and with a drop or two of tween, doesn't overly absorb the chemistry yet allows enough soak in to avoid a thin image. I've seen images exhibit the full range of gray scale with the richest of blacks you can imagine, in some cases, again depending on the paper, almost taking on a mezzotint look.
This is a lead in workshop to introduce the participants to coating the paper, exposing and processing which will lead into the second workshop, "Platinum/Palladium/Ziatype." that will be followed by "Albumen" and later yet, with "Gum Bichromate."