I personally don't see any problem in bandsmen/women wearing their uniforms when at a contest or concert venue, if they don't have an alternative outift, providing people realise that wearing the uniform identifies them with the band, and should entail a certain sense of pride. As a member of the audience especially, it is good to be able to identify which bands people belong to, particularly if you would like to compliment them on their performance and you don't know any of them personally.
The question of how you should arrive at a venue is one that has been raised numerous times, and obviously affects us in the Salvation Army as well, particularly if we are away for a whole weekend. I have been in bands where the expectation has been that you arrive in uniform, even if that means everyone changing on the coach as you get near; I have also been in a situation where we were expected to remain in uniform - including tunics - throughout the whole journey, which definitely seems a bit OTT.
What we have usually done in Hadleigh is travel in band jumpers (plus uniform trousers/skirts of course!), and now, having adopted the summer uniform style, in shirt sleeves if required. There has been discussion about buying some form of travelling uniform, but it seems an unnecessary expense when we have recently had a new set of uniforms anyway. For the concert itself we will normally wear red festival tunics, usually just putting them on before we play- I've just realised that may contradict what I said earlier about contest uniforms, but at least we are identifiable in our blues.
As to the design of uniforms, I see nothing wrong with a move towards a more contemporary design, providing it is smart, and allows the band to be identified. One of the problems, however, in going for too "fashionable" a design is that fashions change very quickly, and the "new" can very soon appear dated.
Above all, I believe we should all wear our uniforms with pride wherever we are and whoever we are.