Hey believe it or not so am I, and I thought all those things too but there are so many people it is easy to stay in the background have a wander at free will noone comes up and interrogates you or anything, there are usually things for sale too and always someone ready to answer questions. They love hamsters and want to share that feeling
Lots of members of the general public go who don't have the first clue sometimes when it comes to hamsters so don't feel intimidated, there wont be a hamster gentics popquiz to get in the door
Emma, pj, ems and Pophammy plus a few others here have been to shows so I am sure they will come along at some point and tell you their experiences.