Red Glare is a twice annual big festival like LDRS or URRF. The site for the Red Glares is a much bigger farm, a little further up toward Delaware. Lots of fliers, several vendors (AMW, BlastCap, Wild Man among others). Definitely worth the trip.
However, pinning down the actual dates is tricky, because it hinges on the Status of the farm and how many crops they still have in the field.