You are right that in Ajahn Chah monesteries the emphasis is on teaching the vinaya and there isn't much emphasis on teaching meditation or any expectation you'll follow a specific technique, if you want this you are better off practising Burmese style. However you'll still have access to experienced meditators and will be able to ask questions whenebver you need to, Wat Pah Nanachaat will likely be better for this than manyThai monasteries.
"Whenever we feel that we are definitely right, so much so that we refuse to open up to anything or anybody else, right there we are wrong. It becomes wrong view. When suffering arises, where does it arise from? The cause is wrong view, the fruit of that being suffering. If it was right view it wouldn't cause suffering." - Ajahn Chah
"Remember you dont meditate to get anything, but to get rid of things. We do it, not with desire, but with letting go. If you want anything, you wont find it." - Ajahn Chah