The wands don't work as well when they're not meant for you. That's what I've found anyway. Depending on whose wand I'm using it's actually sometimes harder than wandless.
I am coming to Disney. But yeah, I dunno if we should practice there. I've been practicing with my dad and Remus and working on potions with my mum, but I could practice with you too. Especially for this kind of magic since I don't think any of them know it.