What are the chances of getting into Rainforest Cafe at Disney springs without a reservation? It would be a Saturday evening at the very end of August.
Based on my history, I'd say highly unlikely. Saturdays will be popular, evenings will be popular, summers will be busy, and DS is popular with a lot of locals.
Yeah a weekend will be rough, but you can put in your name then wander if no hurry. Last time we went on weekend, we walked up with our Landry's Card. I think they told us 20 minutes. The folks around me walking up just trying to get in were told 1.5 hours.