We regularly travel to AZ -- a 1 or 2 hour time difference depending on the time of year and dst. We've been doing this since he was 3 months old (he's now 5). My only advice is to remain flexible and keep a sense of humor. Schedules are great when you're at home, but can be a pain in the butt when you're on vacation or traveling. You're going to have to skirt between the two time zones and there will be a few days of adjustment, but you'll be ok. Chances are, now that he's older, he will do better. I noticed that with my son as well and hopefully you'll find the same to be true. I would just suggest that you go with the flow. You're going to be there for a memorial service, so chances are, there's going to be other things going on emotionally. Just try and keep your stress low. If that means he goes to bed at 10, then so be it. It's only temporary. You may want to try adjusting his nap schedule, but don't beat yourself up if he doesn't comply. You might try transitioning a few days before you leave to get a head start on the schedule change. Good luck!