The instruction map should get included in the scenario file so no, you don't need to add it to the zip. Same for the video, although it is rare for anybody to do one.
Summer varies, it goes quieter in early summer, not just due to people going on holiday but because many of our people are at school or college and that is exam time.
Our demographics and site stats show that we have forumers across HG from early teens to late 50s+, with a multitude of different occupations and qualifications.