I love the Tea Party as well, think they should play ProgPower.
First time I saw them & heard their music was around 97 ( I think) when they were touring as the support band for Queensryche. I never heard them before, but they put me under a spell with some electric and acoustic versions of Edges of twilight songs. I was ready to go home after that, because their performance blew me away and I did not feel like seeing Queensryche anymore after that. Then I went looking for their albums and bought me a copy of Alhambra- acoustic versions of Edges of twilight in there- and I love it and cherish it up to this very day!
I think there are a lot of paralels in their music and that of Orphaned Land -who are playing at the festival this year. I got their singer -Kobi- into the music of TP, by playing the Alhambra album. He is a total fan as well now.
The instruments they use are the same as OL uses and the music sounds very oriental as well, they have an authentic oriental sound- and that is quite something since they are from Canada.
Funny thing is, that when I was at an OL gig in Istanbul the support band played a cover of TP, it was the grand bazaar. That was a bizarre experience!