Dylan, it's a bilge-keeler FFS - a rusty bilge-keeler at that! ..I imagine a raft of 44-gallon drums would sail better than that.
Unless you plan to turn your Island Cruise into a Slug Restoration blog - run! run far away!!.. and forget about it. No-one (especially someone like you) needs something like that - even for free!
From RFC 1925: "(3) With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead."