Aerobars are quite popular amongst European tourists on flat bar MTB/hybrids.
I was quite surprised to see them on lots of everyday commuter bike in a windy part of Netherlands, even old ladies use them on 3-speed granny bikes..
You dont need to ride in a deep tuck with aerobars, they help reduce your frontal profile sideways as well as vertically.
I have seen bar bags work with aerobars.