day dreaming is not the same as dreaming … it is a different level of consciousness. just recording a daydream is using your usual daytime memory.
for me it just seems to be creating work for yourself.
… but i do recall another member who posted about the value of recording daydreams. If I can find the topic I will edit in the link.
edit found it 
keeping a day-dream journal
there is also a topic about the difference between daydreams and dreams … Day Dreaming: Is It Related To Dreaming?
(they are both a couple of years old now 
)