Well, you have a few choices, which depends on a few possible variables. If you are all going to be working together to create your FE's, you will know 3 out of the 9 gifts you will be receiving (If you are all in the same group based on our group size of 10). However if y'all will be each creating your own (which would be keeping with the spirit of the anonymous giving), it would be just as much of a surprise to each of you as it will be to everyone else in the group. The perk of being in the same group, and not knowing what the other cabins in your family is creating, is being able to see how excited the rest of your family gets when they get their gifts. Also, if you would like to be aggressive, you can be in more than 1 group.
Currently, we have 2 groups. The first has10 (which if your family chooses to be in separate groups, we can see if anyone wants to switch. ..which I don't see as a problem, we have 2 cabins in our family and I am sure we could make adjustments there if need be ), and the 2nd has 4 cabins (if all 3 of your cabins join this group, the cabin count will be up to 7).
One other idea would be to consider starting a 3rd group. This possibility however, would come with a if / then situation. If we do not get enough cabins to finish filling up the 2nd group, we would probably have to bring everyone back to just 2 groups. Don't get me wrong, in the past, late comers tend to fill out the groups just fine.
I hope this helps.
Now we just need to get you up to 10 posts so when you and your family deside how you want to arrange your cabins, I can get the FE sign up to you through the DIS messaging.
~ Tink ~