My browser stores passwords very nicely. But I joined dA the first time something like seven years ago, and I don’t even remember which email I used to create the account, making it difficult to reset the password. Plus I use a whole new computer now. So I took the easy way out, and deal with the silly hyphen.
If you’re using Firefox or a similar browser (which I just typed “browswer” three times… man, I’m too sleepy for my own good), you should be able to pull up “Saved Passwords” from the Security options tab and do a search for DeviantArt. It’s not the most secure thing in the world, but it’s something.