I have the long clamp, I needed an additional clamp and used the opportunity to get the longer clamp.
If the question is, is it really a necessity? the answer is no.
is it too bulky? I don't think so.
I like the longer clamp better over the regular clamp because when I fold my focus light (Sola 600) to the back of the housing I like the way the light rest in the housing. But is just a personal thing.
I would recommend with any laptop keeping your photos backed up on an external drive, say 500gb or more. In addition to that, I carry a bunch of SD cards with me and don't delete any photos when on a trip. That way, I have my photos in two different places in case of catastrophe.
I use an external 2Tb usb 3 drive for my photos. When I'm out of home my photos are in the SD cards, the laptop drive and in the external drive. I'm a little paranoid. I have now all my photos in Bluray disks for backup, that way I can delete the photos from the SD cards and the laptop drive.