One thing that will help you after is to get the brochure before you go in a rig, and mark the model you walk through. I went to a large show multiday show and the first night, I realized I had to struggle to remember which model I saw of which brand. The other thing I learned to do was to make the very first picture I took, be of the model number/price sign they had mounted near the door of the RV. then all the pictures after were of that model. New/different model was indicated by picture of new sign.
PS I am jealous you get to go to Hershey, maybe in a couple of years.
