I have a few tillandsias, and they seem to do fine with misting, same as I do for the orchids. They get orchid fertilizer, very dilute at least once a week, and more often in summer. (mine are outside so it's hot and humid in summer)
They're epiphytes like orchids, so in nature they mostly get their nutrients from the air, dew and rain. Humidity is the key for their health but don't water them much.
A grower told me, in lieu of misting which can be hard inside homes, they can be dipped in water and/or a very weak solution of liquid fertilizer for a few minutes then take them out and shake them upside down over the sink to remove the excess moisture. My kids who have theirs inside have been doing this successfully for a while now. Mine are still outside and seemingly healthy.
We have only had a few really cold nights (41) and no freezing - yet. This week has certainly been an anomaly weather wise. it looks like we will have to turn on the AC today. A number of deciduous plants have already sprouted and that could spell disaster if the temps drop too much.
What do you think my chances are of getting some tillandsia home from Mexico if packed and wrapped tightly in my checked bag? Not much chance of pests living here in the frozen tundra-Wisconsin-even tho I have a g'house. It about makes me ill when I see them in the trees down there. I need a bunch more to fill out my wire wreath form.