You won't have a FG reading until the bubbling has stopped, so it will be difficult to predict when fermentation is complete.
Upon making my last IPA, I dry hopped on day 10, which was about 2 days after the airlock stopped bubbling.
Just remember, the more attempts you make at "accessing" the beer, the more your risk of contamination increases.
Token Brewing - Clarendon Hills, IL
Amber Ale - 1 bottle left - aged
Bourbon Oak Porter - 2 bottles left
Oktoberfest - 1 bottle left - aged
Hopped IPA - GONE
Golden Orange Wheat - GONE
Black Cat Espresso Stout - GONE
College Blonde - GONE
Rye'n Ale - 2 bottles left
Hromada - GONE
Next up? BRAND NEW ELECTRIC BREWERY - FEB 2016