Anime Boston

Hi everyone,
This is my first time noticing Anime Boston, and I have some questions about that:
1. Do I need to register my costume not for any cosplay games before I want to wear it to the show?
2. I live in Boston, so do I need to order the hotel? For example, do I need to book the hotel as same as required with the online ticket?

Sorry, I am kind of a mess right now, so if my question is not clear for you, please let me know!

Firstly, welcome!

to answer your questions, the only requirement to attend any Anime Boston space/event is simply to have your membership badge. You do not need to register your cosplay anywhere simply to roam around and enjoy the convention, similarly, you do not need to book a hotel within our hotel block in order to attend though many people do find it helpful so that they can stay at the convention for longer during the day.