Travelling to Rio

I'm travelling to Rio in a month AFTER Carnival and wanted to know
whether anyone has good info on where to stay in Copa -- im
considering California Othon and Debret -- and what their "guest
policies" are. Since it's my first trip out there I'm also wondering
whether it's safe; whether i need guide to show me around.

Does anyone have any links for the hotels with the biggest suites and
rooms?

pretty much anything people can tell me would be helpful.

thanks,
jay