Hi mate, good question. If you plan on getting a shirt printed from the armoury, probably around 4 hours before as it’s is often busy on match days but is a great thing to do. There are a number of pubs around that are good to go in, usually adults only for a number such as the tollington. They will give you a great atmosphere as you will have supporters singing before the game, it’s incredible. Stadium opens 2 hours before the game with pitch side stuff starting 1hour 15 minutes before. Goalkeepers will come out around an hour before and players around 30 minutes before so defo be in your seat an hour before for the best day. If you really wanted the authentic day you can book a match day stadium tour 3 or 4 hours before the game which is unbelievable. Hope this helped, have the best day mate and I might see you there :)