Crawling back in the closet for work

I'll start off by saying that I'm 26 and have been completely out since I was 20. I don't have any stereotypes that would give me away as "obviously gay" and people are always surprised when I tell them I am. Anyway, I recently moved to a new area and recently took a job that is in a different town and is a particularly conservative company and work culture. I'm hoping it will be pretty temporary until I find a better "career job." I was totally out at my last job and it was great. Though, I'm thinking about keeping my sexuality under wraps at my new work, but it's frustrating.Have any of you had to crawl back in the closet for a job? What were your experiences?