Great job on this chapter. I always wished JKR would have let Harry's Slytherin side out a bit more--he must have had it in order to survive his relatives--and/or that she would have put him with one in relationship. This chapter is exactly why I've thought that way.
One small concern is that since you've got DG way taller than Harry, their ability to move in synch under the cloak (or not) might be compromised to some degree. Worth thinking about for future installments.
Thanks for your hard work on it, looking forward to more.
Author's response
Thank you for the review! As for the height thing, well Ron is as much taller than him by sixth year so I was thinking he'd be used to it but I'll try to make sure I keep it in mind for future escapades.