Hey, spoocky!

RCs tend to either fail or succeed based on your level of lucidity. If you are highly aware, and already suspicious of your state, many RCs will work (including the ones you mentioned). On the other hand, if you are going through the motions (and therefore lack awareness), or doubt whether or not you are dreaming, some RCS may be prone to fail (particularly ones involving dream control--like pushing fingers through hands, flying, etc.).

I'm a huge fan of the noseplug. I also have a digital watch that I check after I plug my nose. That being said, the most important thing is that you perform your check mindfully--bring all of your awareness to the present moment and to the serious question of "Am I dreaming?" If you can do this consistently, then most RCs will succeed.