Follow up selectively. A brief event interaction is enough when there was a specific conversation or clear reason to continue, but mass follow-ups usually become generic.

The goal is to create a second useful interaction, not to prove that you collected the most contacts.

Choose the people where you discussed a shared interest, office, practice, or recruiting question and reference that detail in a short note.

For the rest, connect without asking for time immediately. Depth with a few contacts is more useful than shallow outreach to everyone. For a related reference, see When Networking Helps Even If You Do Not Get the Job.

I would ask one concise clarification rather than guessing. It usually saves more time than it costs.