I think I mentioned this one in the 24 hour suggestions thread: support people!

The atmosphere should be relaxed at the 6 hour event, but, if you and your partner are feeling competitive, then in some ways it will be more intense. With only 2 of you, the time between laps is quite short. The support people you have will make this so much easier for you - a little tweak on the bike, someone to remind you to eat something, maybe a bit of massage, etc.....they can help have your food organized, your clothes organized, and if you're doing two laps at a time, they can be there to cheer you through the transition area while your partner is resting / recovering, etc. Support people are also great for figuring out how you are placed during the race (if the timing is easy to access), and for taking pictures. I love doing support at races - it lets all my mom instincts run the show. Of course, I'd rather be on my bike.

Have a super time!! Sending happy fast relaxed organized good weather butterflies your way,
~T~