For larger guilds, you can do egg circles or alternatively, start at your number and work down until you run out of eggs, then start at next number. At the end of the list move to the #1 person and continue. You could also do X amount of people in your guild and then also keep some for friends as an option.
1x1 deco's - suggest not using trees or obelisks but the next level up or higher. That way at least there is a chance of a BP. Also, don't aid people during this event unless you have no other choice. It is better to manually mot/pol. Less aid means less 1x1's you really need.
Just my 2 cents.