Should 2GB Video Files be Combined into Full-Length Larger Files Before Editing in PP CS 5.5?

I shoot with a Canon Vixia HF S21.
It creates AVCHD files on the came, and when I transfer them off the camera, longer takes come off in 2GB segments.
Sometimes I have long takes, 30-60 minutes for example, and one take will be 4-8 2GB files.
The Canon export utility software will automatically combine these files into a larger complete single file of the single take.
I am wondering if this is a good idea or a bad idea to combine these files with the Canon Utility, and edit in PP CS5.5 using the single, larger 8-12GB raw source video file?
What I like about letting the Canon combine the files, is I know I won't make any mistakes in "splicing" the files together.
What I don't like is now I have added double the amount of raw video storage space I am using up on my system.
Perhaps it doesn't matter whether I use the single larger combined file vs. the individual 2GB files... I just don't know.
Is there any downside to using the larger file?
Is it better to use the smaller files?

Read http://forums.adobe.com/thread/1015001?tstart=0 to learn WHY the files must be combined... either by the Canon software, or by PPro by importing from the complete folder that you copy from camera to hard drive
I don't understand "double the amount of raw video storage space"
Does that mean you have BOTH one large file AND the individual files?
If it was me, and the one large file contained everything in the individual files, I would simply delete the individual files

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