I remember five years ago when my group did RToEE in a long-lived campaign that started with everyone at 3rd level. It ended in a TPK where everybody was around 10th-13th level. It was actually a wish, since we were all tired of the campaign at that point. After this adventure was finished, we then moved to a short-lived E8 Pathfinder campaign as a change of pace.
In the RToEE campaign, I remember that the party consisted of an undead-slaying Cleric of Pelor, a powergaming Warlock, a Warmage able to deal out a 40d6 fireball, a Barbaric Tempest with a were-bear cohort, a multiclass Rogue/Fighter/Invisible Blade/Bard/Evangelist of Pelor, a Half-giant who believed he was an elf, and a never-played (due to TPK) Dwarven Wild Mage.
Fun times.