My twins are 6 months as well and teething! You definitely need a schedule. I only allow one nap during the day but it's a long nap. Almost 3 hours long and it's right after lunch which I serve at 11 am. My twins are eating solids, not sure if that makes a difference. I still nurse too.
Our schedule is so rigid that I'm bored out of my mind! We take walks to the park, they have a swim class and we go out on the weekends but Monday - Friday they follow a very strict routine.
Roughly our schedule is:
6 am - Dad gets them up, dresses them, gives them a breastmilk bottle.
7 am - We take DD1 to school, come home, eat breakfast (solids) and watch PBS
8 am to 11 am - we play/learn/swim/go out/do work
11 am - lunch (solids) & I nurse them to sleep
2 pm - Dad comes home, plays with kids, I head off to pick up DD1 from school, run errands
4 pm to 6 pm - we're all at home doing nothing, hanging out, tandem nurse, play some more
6 pm - start preparing dinner
7 pm to 8:30ish - eat dinner (solids), take a bath (separately), have a 1/2 formula bottle
8:30ish - I nurse them until they're sleepy
9 pm - put them down for bed with Dad
9:20 pm - all three are asleep (Dad, babies)
2 am - change diapers, comfort nursing
6 am - start all over
We're going on a 3 day cruise this weekend and I already booked their passage just in case I chicken out at the last minute. I really think it's too early to leave them with family but would like to get away and have some time alone with DH before the trips are born. I'm still unsure what to do. They'll probably end up going with us because I know how they love nursing.