Ferry deals

Where do you find out about ferry deals as it isn't very obvious on the CC website.  We were going to France but due to unforseen circumstances have had to drop that idea.

We are thinking of perhaps Ireland, but ferry prices are horrendous especially if travelling with 4 dogs and no deals so probably cross that off our list,

Are there any great deals if travelling to Isle of Wight and if so where do I find them?  thanks.