I have succeeded WILDing at my bedtime, but not because of skill but because of sleep deprivation so I know what sensations I feel right before I enter a dream. So I'll tell you that.
I had been gaming at a friend's house and not been sleeping for a long time. I was more than 24 hours sleep deprived and what the brain do then is basically force you into REM as fast as possible because REM sleep is essential for our health. People who have a disease/disorder (can't rember the name) but they basically can't fall asleep deeply ad can't enter REM, well they die after 9 months.
So for people who don't have this the brain do something called REM-Rebound ->
REM rebound - Wikipedia, the free encyclopedia
That's what I experienced as I did my WILD attempt.
It happened in just a few seconds as I went to sleep! Just as fast as it does on a DEILD attempt, but with the difference that I did this on my bedtime without previous sleep.
I felt my limbs slightly tingle as they always do when I relax, but then I felt the yawning sound you hear when you yawn, but through my entire body!
I didn't payed much attention to my physical body because my mind was where it all happened! I started to think super vividly, hard to explain but my daydreams got more and more vivid along with all the strange impressions and random ideas/thoughts that come to mind like (Erica that's not right, the forrest is a calm place) then you snap back to awareness and think "Who the h*ll is Erica?!".
But at some point you just find yourself in the daydream which is now perfectly real! I have the dream written down somewhere let me find it...
But remember that the sensations of a transition is daydreamy at first and then evolves into your senes, which is why non-physical testing (movement free reality checks) are super effective in both traditional WILD and DEILD. An example of sucha a test would be to imagine something and if you just for a second feel what you imagined, keep doing it until you feel it for real!
These non-physical tests as I like to call it, is actually called indirect techniques and was first mentioned by Michael Raduga in his book "School of out of body experiences". So read about these and do them in your WILD attempt from time to time when you feel you would like to reality check.
I hope you learned from this WILD (huhu) experience of mine :)
Edit: Here it is:
WILD WITHOUT WBTB! - Wednesday - 2012-08-02 - Dream Journals - Lucid Dreaming - Dream Views
I had too many accounts so that's why I am on this one now, because the rest of the acounts were banned. :P
I see now though that I had previous sleep before the attempt but only 30 minutes so it shouldn't do very much difference anyway, the sensations are the same and when you see the description of hearing a tone, that's what I meant by yawning sound. Enjoy =)