I will tell you that you will be totally amazed at what those units can do. There is a good bit of learning to do. I have only had the Sidescan for about a year and I am still in the learning curve. I need to get out and spend more time just learning the units.
There are some decent videos on you tube if you get time to search Lowrance HDS and sidescan.

PM me when you get down and maybe I will be able to drive down and meet up with you.