My take on it would be as long as you unload and encase your firearm by 7 PM you can observe all you like, but I'm not a CO.
I know personally if I had a Tom or a group of birds just out of range and right in front of me at the end of legal time I would unload, encase and wait for the birds to move away before leaving. That might take 5 minutes or might take an hour.
Two seasons ago I shot a Tom at around 6:55. I unloaded and encased the shotgun. Tagged the bird, took some pictures. Milled around a bit packing up and telling the story to my buddy. By the time we got the the truck it was close to 8. If we met a CO at the truck he would surely ask some questions but neither of us were hunting past 7.
Edit: Sorry rossh I meant to quote your post/question before replying.
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