The RBT FP viewing area, according to the latest reports, has been merged with the BB viewing area, which means it's going to be all ground seating. Even before the areas were merged, the RBT dining package was ground seating only (guests could stand in the back, behind the ECVs/wheelchairs, if they didn't want to sit on the ground). The information about the RBT package didn't say ground seating (like it did for Blue Bayou), but everyone that reported back said they could sit on the ground if they wanted.
The last pick-up time for the Aladdin On-The-Go Package is 7:00 pm (according to the Times Guides from last week), so it's before PtN and fireworks. It's important to note that with the Aladdin package, you get a regular FP (the same as the ones you get from the FP machine). There are a few ground seating areas withing the FP areas, but those fill up pretty fast, so it's hard to say if you'd get one if you waited until after the fireworks ended to head to the viewing areas. Most of the F! FP viewing areas are standing room only. Have you looked into the menu at the RBT dining package? It's less expensive than the BB dining package, but has a reserved viewing area.