If you have the time, I would just buy the activated AP at MCO or at guest services in DTD. I've found that the DTD location is much faster than MCO ... at MCO I waited about 15-20 minutes to get the pass done but the CM at DTD only took 5 minutes. I prefer to get the activated passes because I'm absent minded and I figure if I'd end up forgetting to take the voucher with me.