I have asco's and vandas in spag. moss...in hanging slat baskets. I am LAZY..hubby too(he takes care of these !)
They are doing great...one in spike now ! They get watered when the moss is dry... Large baskets usually go a week ..smaller 4 days... we had to do this as we travel and you can't ask anyone to come and dunk your orchids daily ! Hubby does spritz the roots clinging to the basket.
The moss is not packed tightly ,but there is a generous amount around the roots ,and we try and keep the roots confined inside the baskets..no dangling room here..although I love to see hanging roots of large vandas.
Try it ,I think you will be amazed at how they respond !