2 or 3 naps... what to do?

We are going on vacation next week and we think that you're ready for 2 naps, but we're not sure.... I think that some days you could do it, and the next you really need to go down at that 2 hour mark. Your schedule has been this for the last 2 months, with just a small increase in amount of food, resulting in this as of today: 

730: 7 oz bottle

830 am 2TB oatmeal and fruit

10-12 nap

12p: 6 oz bottle

2-3p: nap

3 pm: 6 oz bottle

5-6p: nap 

6pm: 1TB oatmeal with fruit and veggies

730 bath

800 8 oz bottle and bed

My bigger question is: how do I get in another feeding and get you to 2 naps??  Monday and Tuesday we did this: 

730: 7 oz bottle

830 am 2TB oatmeal and fruit

10-12 nap

12p: 7 oz bottle

3 pm: 7 oz bottle

3-5: nap (one day it was only until 430, so I gave you a small bottle and fed dinner at 6)

530: fruit and veggies (cut out cereal here due to constipation issues)

730 bath

800 8 oz bottle and bed

But then Wednesday we went back to 3 naps because you were absolute fussy bears at 2 pm... and then you only slept 30 minutes. And then 30 minutes again at 5 (Olivia) and only 5 minutes at 5pm (Charlotte). So... today I will try 2 naps again! The key will be to more than 1 activity between 12-3 wake time. If you get bored, you fuss bad and it grates on my nerves and I give in too easily. I think we'll go shopping after your noon bottle! 

And now it's time for your cereal....