Nope! We wanted to give our family and friends an option to have their travel sorted for them but please feel welcome to travel the way that makes you happy.
Yes - you most certainly do. Go to this site for details: https://travel.state.gov/content/travel/en/passports/apply-renew-passport/how-to-apply.html
Some people add "International" plans to their phones traveling abroad. We've found that it's easy to purchase a prepaid sim card at the airport for 20-30 Euros that will give you an Irish number and allow you to make calls and texts locally.
In all of the parts of Ireland for the wedding and the tour the Euro is used. We tend to bring over between 100-150 Euros a day depending on how much shopping we plan to do. You can order Euros at your bank or at AAA prior to arriving in Ireland.
Yes - most cards are fine in Ireland! We've found a capital one card with no foreign transaction fee which has been very helpful.
If you have a credit card without a foreign transaction fee, choose Euros. If you choose US Dollars, most retail stores will add a 3-5% (or more!) transaction fee to the purchase.
As a non-citizen, we are not required to pay tax on goods that will be brought home. Some stores will hand you a form or a "Horizon" tax free card. Hold on to all of your receipts during your trip. At the airport after we pass through security there will be two desks to process these refunds. You will need the receipts, your flight details and passport information for refunds to be processed to your credit card. Some of the cards can be pre-registered online as well.
Depending on your airline, the luggage restrictions can be quite limiting. Please check your individual flight carrier to see the maximum weight allowed for all combined bags. Dublin airport tends to have long lines while people have to pack and re-pack their bags to meet the weight requirements. Consider ordering a luggage scale to bring with you (we will have one with us!) on Amazon for less than $10.
We've found for USB charged devices it's easy to purchase an Irish USB plug instead of a converter plug. We've bought ours at the airport or other convenient stores but you could pre-buy one on Amazon as well. For devices that need to be plugged in - first check to see if they are dual voltage with the manufacturer. If so, you need only a plug adapter. If not, you'll need a power converter. Warning: Plugging a non-dual voltage product into an adapter without converting the power may damage your item.