I'm currently reading "Long Earth" by Terry Pratchett and Stephen Baxter.
This book is really amazing (no spoilers please, I'm about 75 % through it atm).
For those who don't know it's about alternative realities being discovered. None of those realities seem to have humankind in them, they do however have all other kind of life forms, they are what Earth might have become if humans did not evolved.
You travel between worlds with the use of a device called a "Stepper".

I just have this idea to try it in my next LD. Make my own stepper and step to the Long Earth.
Should be easy to do if the dream is stable enough.
What do you guys think about this? Any of you tried this or other method to reach alternative realities?