Do you care about Oga's, Savi's (lightsaber), or Build a Droid? And will you be getting a
DAS? Is your 18-yr old good in crowds, or do you want to avoid them?
If you want to do one of the first three options, you should do it first. If this is your only reservation, I also only recommend only one, as each take time for line-up and the experience itself, and you want to enjoy the land. If you don't care about doing any of those experiences, then I would say you can enter the land a bit more relaxed. Wait further back in the crowd or at the end. Don't do the ride in the beginning, as the line will be longer. Around 1 hr afterwards the line should drop; I have been waiting for times around 25 minutes. You guys should be able to do it a couple times via standby.
If you are getting a DAS return time, you will need to stop at the kiosk. On Saturday night it was just inside the Big Thunder Trail (basically right outside of the tunnel you will enter through at 8am), but is portable, so could be moved (if you don't see a stand with Guest Services CMs, then ask a CM and they should be able to direct you).
Besides that, wander the land. Pop into stores. Grab some food. Just savor the experience! Make sure to get anything essential done by 11, as that's when the next group comes in. You can probably leave any food or shopping in the Marketplace until then.
Anyone else have other ideas?