Bright suns, Jonathan, and welcome to planDisney!
I'm eager to see that you're interested in visiting in Batuu during an After Hours event at Hollywood Studios! You'll definitely spend some of your time dodging the First Order with the Resistance... just note that it will be a little harder to blend into your surroundings because of the low crowd levels! Plan accordingly, traveler.
I'm happy to report that my spies in Batuu have confirmed that
Oga's Cantina has been open during previous After Hours events at Hollywood Studios. While reservations were not available for these extended hours, walk-up availability was plentiful, and the atmosphere was incredible! Give a wave to DJ R-3X for me!
Now,
Savi's Workshop is a little more nuanced. Because this operation is working deeply undercover to avoid the wrath of the First Order, you'll need to check Savi's Workshop's reservation system for the particular night that you will be visiting Hollywood Studios. If Savi is honoring After Hours Guests, you will see that reflected in his reservation system online. I highly recommend making a reservation for this experience. You're also welcome to swing by the front of Savi's right when you get there to see if he will be offering lightsaber crafting that evening.
While you're in Batuu, enjoying a refreshing glass of blue or green (I prefer green) milk! Days and nights on this planet can get hot, and this cool drink is the perfect pick-me-up!
If you have additional questions before your arrival, Jonathan, we hope you'll park your podracer at planDisney again.
The force will be with you, always.
Allyn