Yup that would work too.. just be sure you dont flood out of the tank when submersing... Id think you'd have to be gentle about it too
I have moved bettas the other way just after hatching before. Not cool having to, long story.. they got moved like 3 times before they were a week old tho and didnt have any problems. (Other than I lost 2 out of the end of the baster in one drip, learning the finger rule the hard way)