Thanks for the reply!

Ok...let's just suppose that you really wanted to give each PC their 2 minutes of fame for whatever reason. Is it possible to have everyone on the same map, but only allow certain PCs to interact with said map (to avoid having others just walking around screwing up said PC's scenes with random shenanigans that only players can dream up)?

Also, is it possible for the DM to visit other maps apart from whatever the party may be doing? For example, let's say party decides to explore a trapdoor in a house, but you hadn't actually thought of what might be down there. Would it be feasible for you to create, say, a "mini cellar" without negatively effecting the game's pacing?