I would like to make a trip from Dublin with a rental car to Rosslare, cross to Fishguard with the rental car, drive up the coast of Wales, stay several days, cross back to Ireland by way of Holyhead to Dublin. I'm having a bit of a problem with the rental car. The only company , I have found that allow the crossing is Dan Dooley. they want a "CASH" deposit of $1,000.00. I have no problem with the deposit but would rather not carry that kind of cash with me. Does anyone know of a company that allows a deposit with credit card?