Optimization of mesh router placement in Wireless Mesh Networks (WMNs) is an NP-hard problem. To deal with this problem, in our previous study, we developed WMN-PSOHCDGA hybrid simulation system. In this paper, we extend our study by implementing four crossover methods (UNDX, BLX- \(\alpha \) , SPX, psBLX) and two mutation methods (Boundary Mutation and Uniform Mutation). We carry out a comparison study for two scenarios by combining these methods considering Subway distribution of mesh clients, Linearly Decreasing Vmax Method (LDVM), and a small-scale WMN. The simulation results show that the combination of SPX with Boundary Mutation has the best load balancing.