Keep in mind that people who submit deposits early don't get an advantage when it comes to housing or access to classes. That's a really common question! Spots in certain sought-after classes are reserved for each orientation session. Students who attend the first orientation might see a class as full, but it will open up for the next session because some seats will be released.
Also, keep in mind that we really use the "drop/add" period heavily here at UVA. The first schedule you put together most likely won't be the one you settle on.
You have until 11:59 PM on May 1st to submit your deposit. As always, I suggest submitting things a tad early just in case something goes wrong and you need assistance from the help desk (4help@virginia.edu is their email address).
We are in the middle of our busiest visit week of the year right now (lots of visiting juniors on school vacation) and we are also reading transfer applications. It's a busy time, but I'm happy to field your questions in the comments!
Good luck with the big decision!