[JillnChris]

Eva has always been a great sleeper. There was a period of a week though where she would scream bloody murder for 3 hours every night when putting her to sleep. First we tried sitting in the room while she was in her crib, that didn't work she just cried harder. Then I started doing the modified cio method. Basically you go in the first time after a minute of crying lay them back down tell them "I love you but it is time to sleep." The next time you wait 2 minutes, then 3, and so on and so on. Once we started doing this the crying got less and less and it made me feel better that we weren't just leaving her in there crying for the whole 3 hours.
On a side note you want to make sure there are no medical issues going on like an ear infection. I agree with you that it is probably just the trip that messed him up.