Travel Giant indoor waterpark opening on East Coast in 2023: See Great Wolf Lodge’s biggest park yet January 19, 2023January 20, 2023Molly McVety, Delaware News JournalComments Off on Giant indoor waterpark opening on East Coast in 2023: See Great Wolf Lodge’s biggest park yet Great Wolf Lodge's newest and biggest park to open August in Perryville, Maryland. Here are the first looks at what to expect and how to save money.