Recently I've been exploring a lot of new blogs and found some interesting articles. To mention a couple, you should definitely read:
This post on Textile Time Travels. Annika Madejska talks about SCA events but to me it seems there are some similar issues on the 18th century reenactor community as well. The second half of the article in particular.
Also, on HistoricalSewing.com Jennifer Rosburgh has written a great article about trying keeping up with other costumers. I'm sure many of us agree with her.