Tewkers is great. I've taken part at least half a dozen times (and I've shot that cannon, I think - blooming loud!) and would recommend partaking or observing to anyone.
It always seems to be raining or blisteringly hot, though - never a normal temperature 
Always said people like you are a credit to history and i really get annoyed at the media who have a crack at guys who dress as WWII Germans, if it was'nt for these people the actors who play the role of the British and American forces would have no body to stage battles with and educate the crowd.
Well done to the German regiments who reenactment across the country you put on the best show at Historical Festival this year and was a joy to watch, will be putting on the battle video soon.