In order to follow you into a dungeon, the GM must suspect you, and use a command that moves him to your character. GMs can't just pull up a list of all the people in dungeons and go to one of them.
So, if you are smart, you will only enter Crevice for a solo run on a busy server, where there are lots of other people around. Unless a GM is already watching you for some reaons, it is VERY unlikely that he will follow you into the dungeon. To him, you are just another player entering a dungeon.
On the other hand, if you go to a very empty server, there is a slightly increased chance that a GM will be watching. And a lone player entering Crevice is a bit suspicious.
Best plan: Go to crevice entrance on a fairly empty server. Then relog to a busy server (i.e. Blood Dinker for Abaddon), then enter the dungeon. If a GM even notices you, he will probably think you left the dungeon, and are just reentering it.