Limping with AA/KK in EP: Always, sometimes, never?

[The Lobster]

If I'm UTG with KK or AA I almost always try to limp/raise it. Sometimes they do get cracked this way... anybody can flop a low 2 pair and crack those A's/K's but you'll also win monster hands that wouldn't otherwise be played. Last night I unsuccessfully tried to limp/raise AA but got 5 more limpers instead. This is exactly the situation I don't want to be in, but luckily the flop came down A J J. I flopped the second nuts and won a big hand against somebody who had a J. If I raise from UTG I maybe get one caller if I'm lucky (who doesn't get involved post-flop with a board like that) or I take down the blinds.

The only caveat is that you HAVE to be able to release them post-flop if you're going to play like this. I just don't think that an UTG raise with AA/KK is a good way to take advantage of the hand in the long run. If nobody else at the table is gonna raise it for you then they're unlikely to call your raise.