This flexibility could save you hundreds of dollars. Don't book an early morning flight. With all the last minute details and perhaps a reception running late into the night, opt for a later flight or the following day, if possible. Do keep your expectations realistic. No trip is ever one hundred percent perfect.
Train conductors go on strike, it rains at the beach and flights gets cancelled.
Be mentally prepared for quirks of travel. Don't over plan. Allow for some down time in your honeymoon. Take some time to relax and unwind from the stress of the wedding. Make time to just do nothing.