You’ve identified which lectures you want to be sure you attend. You get there on time and feverishly take notes recording the groundbreaking content you are hearing. The lecture ends and you run off to the next. NO!
Take a minute to introduce yourself to the speaker, ask him/her a direct question, exchange contact information. Communicate on social media. Then, when you have a question come up in your practice, you will feel comfortable reaching out to him/her for a quick opinion.
Continue the learning process outside of the seminar. Who knows, maybe you will develop a relationship that leads to adding him/her to your advisory board or reconnecting whenever you are on the road.