Do you have access to Choice Privileges points? Even if you're not a member of their program, they are a transfer partner with Amex Membership Rewards, and the Clarion Hotel and Clarion Suites in Limerick are both available for an 8K points redemption per night. For comparison, most mid-level Choice hotels in the US go for 16-20K per night so it's kind of like getting two nights for the price of one.
Little further from the airport than the Park Inn, but perhaps worth it if you can do a redemption.