This past weekend I witnessed some campers with a fire so large that the flames were about 6 feet high. Hot embers were flying everywhere. This was at a site with about 25 feet between 2 RVs. Campfires are nice but in moderation, like the OP said. Not only is a very large fire unsafe for the people but it is also dangerous for the entire RV park, should the embers cause a fire elsewhere, and you can damage someones RV. There is a thread I just replied to about someones roof that was damaged by hot embers from a fire.
Keep the fires reasonable and stay safe.