I (and some others on this site) believe that stabilization can actually
create the issue of early wake-ups. Dreams often create obstacles based on what you fear will happen, and if you fear you are going to wake up, well . . . .

On the other hand, I have had several LDs where I
wanted to wake up (due to thinking I needed to be awake, damn false memories), only to find that, magically, the dream was so stable that waking seemed impossible.
My best advice would be to not worry about waking up. I have had decently long lucid dreams (longest was approximately 2 hours, with others ranging between 20, 30, or 45 minutes), but all of them contained a single element: it never occurred to me that I might wake up--or at least not until the end of the dream. However, merely thinking about waking up and leaving the dream world often carries us that way.
So don't think about it! Relax and enjoy the moment. Hope that helps.
*Moved to General Lucid Discussion*
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