If the fish was healthy when you caught her and you didn't "play" her for a long time, bass are pretty tough. (This is one reason I use heavier gear than I need, to get em in the boat ASAP for several reasons.) If, as you said, there was little blood and a clean hook exit you should have been able to get a pic and a couple of measurements without much danger of losing the fish. Fivebass described the optimal scenereo, but without a livewell, what choice did you have? I would have moved quickly and recorded the facts, then let her go. JMHO
Ronnie