Hey Hazel. Good luck attending the job fair. To be honest, there are lots of jobs at companies that may not attend these sorts of events and also my experience at one job fair is not indicative of everyone’s experience at these fairs – you may find that they are very open to you.
I can understand the reasons for liking boot camp grads – they have shown commitment in terms of leaving previous jobs and spending a lot of money to do the course. Future employers value this. At the same time, as self taught coders we can also show this with technical skills and a great portfolio of work with great personal attributes. When it’s all said and done, that’s all that counts. Good luck.