I'm in a similar position, I don't really have to deal with cold, but we do suffer from drought. I've several hundred mostly Cattleya species growing on trees in the garden, but it's very early days after 2 years of heavy rain so it's hard to gauge, but we're now in a really dry period so it's putting my plants to the test. We generally have decent humidity which is a huge benefit, but recently we've been getting some very low readings.