
The Hovercraft from Portsmouth also allows dogs!
And Wightlink Ferries sponsor a number of local businesses and individuals on the IOW, including a very successful young lady who is a top YKC Junior Handler, meaning she can get to more shows :)
I've not taken my dog over, but always intended to; I have friends in Portsmouth who go camping there with their dogs every year and have done without fail for over a decade. It does seem a very dog-friendly place and of course there is the bonus of looking out for the red squirrels!