I honestly don't know much about bondage dungeon...I would always worry about safety and do lots of research before attending one. You should check with the local health & police departments to check legitamacy.
One concern I have (and maybe I'm just being over-cautious) is that you not rush or jump into things; I understand this is important to you, but you do want to make sure you're not doing this for the wrong reasons. I am happy to give you advice here, but consider a full, live evaluation with some mental health professional...I know you may not choose to do so, but I feel ethically obligated to suggest this. It's good to be patient and planned rather than impulsive.
Regarding the job, you do bring up a good point. It's hard to know what to do b/c you can't predict how they will react. You may want to call them from a pay phone or anonymous number and just be up front about your cross dressing and desire for a job. I hope this helps...let me know if you have other questions. Take care.
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