I have been planning a D&D 5E campaign of episodic journeying through wilderness roads to the sea and then onward to Camelot, with the players joining to roleplay famous characters like Galahad and Mordred and Morgana le Fay, or obscure characters such as the werewolves and half-giants that became knights of the Round Table according to various medieval records and traditions, or invent an original character that somehow has been omitted from history and legend or even worse was remembered by bards and minstrels only as a bad tipper.
4th level emphasizing mounted combat & magic in conflicts, with fights to the death possible but more likely until either side yields and surrenders. Adventure, romance, mercy, redemption, betrayal, enchantment. Centuries of lore that rarely fails to contradict itself but remains iconic. The map is based entirely on real world geography but there are additionally invisible extraplanar castles and time-distorting quasi-real lakes and weird unmappable islands, often by inhabited by faeries and by magicians otherwise.
Set in the high summer some months after Merlin disappeared, the quest for the grail has not yet been formally announced though there are many reports of visions, a questing beast rampages across the lands, and the dragons and giants that had retreated from Camelot at the height of its glory have already begun to return.
Party would all ride horseback with wealth befitting aristocrats and beware attacks by adversaries and monsters. Twas apparently most fashionable in those days to travel in small groups without guards or minions because self-defense is more courageous.