Hiya Thomas - welcome to
planDisney!
It sounds like you've got quite the group coming to enjoy all the amazing dining, entertainment, and shopping available at
Disney Springs!
T-REX Restaurant and
Rainforest Cafe are such fun and immersively themed dining locations, and that's part of what makes them so popular with
Walt Disney World Resort Guests. As I sit here answering your question, I can fondly remember feeling the heat coming off the erupting volcano and hearing the sounds of dinosaurs lurking in the shadows!
When I just tried to make a reservation for that party size on that date, I didn't receive an error message but did see that no reservations were available. Because these are not Disney-owned-and-operated dining locations, you might have better luck calling each restaurant directly to inquire about dining options for your larger group. I actually did just that a few weeks ago and will be dining at
The Edison in Disney Springs tomorrow evening with a group of 14!
Another tactic you can try is splitting your group into two smaller parties and finding two separate reservations at around the same time. When you check-in for your reservations, you can explain your group's situation and request that you be seated nearby. While Cast Members will do everything they can to help, you may end up sitting in different areas of the restaurant. While that might not sound ideal, at restaurants like T-REX and Rainforest Cafe, you'll get completely different scenery, so separate tables might actually be more fun!
I hope this information helps -
let me know if any other questions arise!
Ryan J.