My husband and I will be touring Ireland in a rental car for 9 days after which we will have 5 days to ferry across to get just a little (and we know it will be only a little) taste of Wales, Scotland (Glasgow and maybe Edinburg?), and England (Cotswolds, Lake District, Cornwall?). We are very unfamiliar with the ferry systems in Ireland and are even more confused after visiting several ferry websites. Which ferry line do you recommend? Which route from Ireland? Which route is the shortest and cheapest? We fly into and out of Dublin but plan to be in Belfast also if that is better. Is it better to turn in the rental car or ferry it over. Thanks.