The 2018 Conference will be 4th Conference that I've attended. I've been a CNSA since 2006 with an established notary business. From a professional and personal standpoint, I feel that attending this event is a "must do". Why? I always learn something new that helps my business and helps me be a better notary.
Yes, it does cost a lot of money. If you can afford to go, I say go.
I will say this. I've met other notaries - those who are not signing agents or business owners. Two of them said to me that they wished that there had been more workshops geared to their interests.
I hope this helps.