Anyone can dress up! It’s really fun and you don’t need a professional level costume either. Just if you plan to have edged weapons (like a sword) as part of your costume it needs to be sheathed and peace-tied, which means zip-tied into the sheath so it can’t be drawn. And no crossbow bolts or arrows. Bows with no arrows are ok. My advice is bring a bag with water and money in and stay all day! We went to king Richard’s faire near Boston this year and it was really fun!