"The" is unnecessary, and even unnatural unless you are referring to a specific group of people. This is most natural if specifying anyone who is an expert or a native speaker: "I hope experts and native speakers help me too." "I hope the experts and the native speakers help me too." Which experts and which native speakers? Your answer implies you are referring to some specific ones. Here is how you could use this properly by specifying them: Yesterday while in Mexico, I saw some construction experts, native speakers and store clerks. The clerks helped me. I hope the experts and the native speakers help me too.

Thank you Mary. I had never expected this answer. I prefer 'the experts' too.

All of these sentences are grammatically correct, however I'd go with "the experts."