A cache is deserving of a 5-T rating if there is special equipment necessary to get the cache.
Our "special equipment" was a kayak. However, you can use use whatever "special equipment" that you would like to make this island grab. We saw one guy out paddling on his Coleman air mattress!
It is suggested that cachers put their "special equipment" in the river at the Barton Park boat launch and get out at Carver Park.
Most cachers will want to make this a Summertime cache!
Good Luck and email if you need help!