Relax! Look at the questions that you have to answer. When you have done the interaction, get out of the line of sight and note which things the employees missed. Also, their descriptions and names, and greetings. You can walk away from the site repeating to yourself things like, "Amanda, 5'3", brown ponytail.". The best way to remember names is to address the person by their name, as in "Thank you Amanda." They really are not looking for you, so relax!
Using this method, you get home and know that anything that you did not note as "missed," they did. That helps with all of those yes/no questions.
Just get out of sight and write your notes.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.