Yes, it does not come with an SD card.

With my GoPro set to 10mp and a 32gb card, I think the display shows 9,999 remaining. If you time lapse for 8 hours, and take a picture every 10 seconds, you will need to have capacity for 2,880 shots ((8 hours * 60 minutes * 60 seconds) / 10 seconds-per-shot). So you will have plenty of space. The thing you might start running into while on vacation is somewhere to dump your cards to if you start to approach capacity.