Here is a link to an outfitter in the Posted by: kayamedic on Sep-25-12 9:40 PM (EST)
Rossport-Silver Islet area. http://www.uncommonadv.com/kayaking/great-lakes/silverIslet.html Note the prerequisites. Now you do need to get started somewhere and start working so you will need a kayak. It does not fit me well but the Necky Eliza was very forgiving (its for the petite and I am not) in Belize in rough seas.