Since your lawyer will act on your behalf at the proceedings, there is no need for you to come in person.
It is crucial to prepare for the proceedings carefully, so that your lawyer can have all the necessary evidence to prove beyond reasonable doubt that the refusal breaches UK laws regulating human rights. If you need more time to collect the evidence, your lawyer can file a special motion.
You will have to put up with the fact that appeal to the tribunal, preparation of the documents and court proceedings take a lot of time. It might take you up to 3 weeks even to get a tribunal ruling in writing.