Yes, you can grow vandas bare root, potten in baskets or mounted.
These are two of my vandas:
My teeny baby vanda (Wink):
Vanda Alliance :: Vanda Vivian x Vanda Red Ball (2009) picture by peeweelovesbooks - Photobucket
It's doing much better currently.
And here's a current picture of my vanda denisonniana mounted on teak:
Vanda Alliance :: Vanda denisoniana x sib #2 (2009) picture by peeweelovesbooks - Photobucket
Watered every day......fertilized weekly or twice weekly. Right now the rains take care of watering for me.
You'll find you can grow most stuff either potted or mounted. Depends on your preference, growing conditions and space.
Good luck and don't worry. Ask a lot of questions--we are always happy to answer.
Oh, and there's a thread (vendor feedback) that people post about preferred vendors. Like anything else in orchid growing....everyone has favorites. Just BREATHE and have lots of fun.