Gator :

You can take any of several paths to get where you want to go. The differences are time , effort and money. I would not just let it refill and hope for the best. To me that would be the hardest method and least likely to get there. If you choose to leave some larger LMB then you will have to stock larger forage fish in enough numbers to feed the existing fish (and offspring)plus establish an adequate breeding population to sustain the fishery. But to do any plan you have to have a good idea what is there now.