How to bake MSL components for DIY reflow?
I wouldn't worry about it too much, I would try a one or two and see if you have a problem. I've never seen any pop-corning (the building that I usually reflow is about 30% humidity however, in a more humid environment 60%+ it might be a different story). 

It would also depend on the cost of the component, if they were a few dollars its probably not worth your time for a bake out and to just go for it. If these are tens of dollars components, I'd take every precaution to make sure they are happy.

If its a MEM's device I might consider it because I do know people that have hand reflowed and had issues with devices working (we wern't sure it was ESD so we did humidity and ESD control and the problems went away), just put it in an oven at 125C for 24hrs if your worried about it.

By the way, you can use a hot air gun with LFCSP and hot air guns are relatively inexpensive. However, the humidity rules still apply with hot air guns.