Question about HILDs

I'm wanting to use a HILD-like technique to increase my dream recall, because right now it's really bad, and I was just wondering - does the technique work even if you're not saying all the things out loud? Like, can you just think the mantras and stuff instead? Because I live in a house full of people and me talking to myself inside my room, even if I wasn't talking very loudly, late at night would pretty much be heard by everyone =/ and it might be a bit hard to explain to my family that I'm trying to hypnotize myself to remember my dreams better without being sent to a shrink or something. xD

So, I answered my own question by trying it last night. I think it worked!

Yeah it's sopposed to work just as well inside your head, gothlark told me it works even better if you can communicate without the use of words with your subconscous may seem hard to do at first but you get a feel for it I guess, by that I mean try to think of what it feels like to have an ld and push that feeling onto your subconscous, and try and feel what it's like to recall alot of dreams.