If you need your bags right away when you get to the resort, don't use the tags upon arrival. It can be a big hassle getting the bags yourself and hauling them down to the bus terminal, but on the flip side, you have your bags with you as soon as you arrive at your resort and don't have to depend on ME to bring them to you at their convenience.
With our small children, what we've learned to do is tag all but one bag and pack that one with things we'll need for that day and night for ourselves and the kids. (food, snacks, swimsuits, pajamas, diapers, toiletries, etc) Make sure you pick up that bag, and take it to the bus terminal with you. Tag your other bags and have ME deliver them.
Both times we've used ME, our bags haven't shown up at the room until late in the evening and we were fortunate to not have to worry about the things we needed right away. Some people get lucky and their bags show up earlier, but it can be very stressful trying to put kids to bed without your items.