Especially when taking a dinghy outside of bay, take a good flashlight (ie bright, not I-Phone)....even in the DAY.

IF your engine conks out on your return, you will likely be too far to swim as the current/wind will sweep you out rapidly as you trouble shoot engine.(I once had fuel line crack just before connector, starving the outboard for fuel... easy fix once back to the boat, but nervous while paddling with 2 girls with an offshore wind).
The bright light will be a lifesaver if someone is searching for you in the dark.