Well, for "people on the move" in daylight conditions, there is a shutter speed range which will blur movement, and a shutter speed range that will stop movement crisply; that is a critical decision. My feeling is that for festivals like this, the best choice with a modern d-slr is ISO 400, which gives better motion-stopping ability than ISO 200 or ISO 100 would give, and also gives two moe full f/stops' worth of depth of field. With a wide-angle lens, or a semi-wide angle lens, this means ISO 400 and f/7.1 and about 1/250 to 1/1000 second under many brighter-light type shooting conditions. How about Programmed Auto mode, at ISO 400?
If you're unsure about basic settings, RAW capture mode is always,always,always the best starting point. That gives maximum editing potential for later. ISO? 400, not 200, not 100; if you're asking about basics, then by all means, START at ISO 400 for this type of festival or event; the shutter speed and end f/stop are vastly MORE-critical than a small bit of technical or theoretical image quality gain that the lowest ISO possible will give: you told us there camera model. so we know it has adequate dynamic range and quality in RAW mode at ISO 400...it is no longer 2002, so ISO 100 is a bad start point for your specific situation.
Editing: these are obviously edited. Lower saturation, shifted black point, "Instagram-era" look to the finished shots. There are Lightroom presets that can deliver this type of look with ease. I personally enjoy this look on the right types of subjects. it is, after all, 2016, not 1985, so this look is very current, very much of the era.