Shouldn't be a big issue as long as the content on each page is different. I would still use pretty URLs (/---/---/) because it doesn't look garbage.
You can use rewrites in .htaccess file for that. I did that before, shouldn't be very hard to implement. (Don't ask me how though, it's a looooooong time ago)That's what I thought.
The reason I'm asking is that converting what I need to use to /-/ urls would require significant changes in a codebase.
The simplest way to go forward with that is to use querystrings instead, just making them simple, like ?documentation for example.