Its still a work in progress! what I envisaged was a bit like Secret Sister, in that you don't know who you'll be sending to or who you'll be receiving from (although here you'll know earlier than SS). So, say you have groups that look like this (assume all 2-page):
Family general
AWM
DIT
Nemomom
mycutiepatooties
MazdaUK
Boy stuff - sports
PO3
DIT
AwM
MazdaUK
rlovew
Disney vacations
AwM
mycutiepatooties
rlovew
PO3
nemomom
DIT
ArizonaRita
So if you were sending to just one person, say AwM, she would be short a set of pages she wants, or else you'd have to do an extra set of pages for her and you'd be making more pages. what I'd do would be to try to make sure you have as few parcels to send as possible, so I'd pair you up with AwM for groups 1 and 3 but match AwM with me for group 2 (assuming AwM is willing to send overseas). It will take a bit of doing but should be OK, I think.
And yes, definitely groups for 2 pages and one page.