According to the park's event page, they are offering the following discounts:
Discounted hotel rates are available for CoasterMania! Subject to availability. Valid June 5-8 only. Call 419.627.2106 or visit the reservations page
and use promo code MANIA.
Hotel Breakers: starting at $134
Breakers Express: starting at $86
All other information on Coastermania can be found on the park's event page at https://www.cedarpoint.com/online-fun/coastermania-
Hope this helps,
Northern Ohio Regional Rep