Humid Hide for Leos

[atw]

I am in the process of building some humid hides for my leos. I am going to follow these directions:

http://www.reptilerooms.com/Sections...-2-page-1.html

but I have questions concerning the substrate. The above article suggests using sphagnum moss. However, this article:

http://www.drgecko.com/humidity.htm#...ied%20Shelters

suggests using either:

• * Sphagnum moss.
  * Peat moss.
  * Sheet moss.
  * Sand and vermiculite mixture (for older leopard geckos).
  * Vermiculite in a mesh bag (so gecko does not eat the vermiculite).

I am leaning towards peat moss. Is there a strong case to be made for one type of substrate over another? I am interested in what other people have tried and what has worked for them.

Thanks,
Adam