I decided to 'just do it' and I tied one of the orchids I have onto the log in the pond. I put some algae on and under the roots and I'll spray it every day until the rains start. It's quite humid but the roots are not in the water. I believe it is an Encyclia cochleata, I got it last fall and took a picture when it was blooming.
Here it is on the log in the pond.
