Noyou don't need an agency.All the help you need is on this Forum
Remember this will be your first meet just see how it goes I'm sure it will be great.
You only say your going for a few days? Can you not extend this a few days is not enough.
Most of us tend to go for at least two weeks-it's a long way and expensive flight.
Whatever you do don't worry too much,I'm sure we were all nervous our first meet but I'm sure all on here would say it was totally worth it.