Dublin: We are scheduled to arrive in Dublin at 7:30 am. on a Saturday and have that day and then next in Dublin. Rather than picking up our rental car upon arrival we plan to take a bus to the hotel, leave our luggage and do a little exploring; Guinness Storehouse is within walking distance. The next day we plan to do a hop-on hop-off bus tour and the following morning return to the Airport to pick up the car. The two main attractions are Guinness Storehouse and Trinity College/Book of Kells and we want to skip the lines at both.
There seem to be several options, passes, tours, etc but I'm not sure what makes most sense so I'm hoping someone with experience can enlighten me.
Any suggestions and advice will be appreciated.