No attacking from 12pm to 1pm PST on 1st April during temple construction part of the event, before and after this you can do what you like as far as I can tell.
Although I'd say if people are prevented gathering logs leading up to this event, therefore no temples will be constructed during the 1 hour building period, no goodies from the gods will be given to the builders or the attackers so a non event for everyone is say, if that's what your questioning DDT
Unless if you tell the guides you want to be a defender they could spawn the required number of logs inside your area before event?
I really like the idea of this event, but see no incentive to be a defender if you gotta collect logs yourself, do defenders get better reward over attackers?