Your odds are slim but it's not impossible. You can walk the beach at night or in the early morning, as this time of year there are no restrictions. The hatchlings come out when the temperature of the sand is very cool, so even on cool rainy days you might see them in the daytime. If you are using a white flashlight at night just remember that they use the light reflecting off the ocean to guide them to sea. They will follow your flashlight, so either help guide them the right direction or turn it off once you've found them.
You shouldn't pick up turtles and "help" them to the ocean unless they are seriously lost and going the wrong way. In that case, you should never put them in the water, but bring them to a spot about halfway up the beach and preferably where there aren't visible artificial lights.
I really don't recommend hiring a guide for spotting hatchlings. Not only is it an unnecessary expense, but many guides pay a small fee to a man who digs up nests to show the turtles. I have seen hatchlings that died from baking in the sun because they weren't ready to emerge from the nest. When the temperature is above 35°C their muscles stop working and they can't do anything to get out of the sun.
If you do see anyone digging up nests or otherwise bothering turtles, please report those illegal activities to the national park at the ranger station, located at the far South end of the village. If you are in front of Laguna Lodge you can ask the receptionist to call the national park for you. Try to get the names of the offenders or a good description including what they're wearing.