I have read about the ideal boxes. We have quite a few owls and goshawks around the cabin which would deter bats from using one (from what fish&game here says). In the 12 years we have had the property, I have never seen a bat. I used to enjoy watching them above our pond in the evening in Texas.Look into a bat box. Skeeter population should go down if you install one properly.
We are planning to sell our place and move, but if the property doesn’t sell this summer, I should consider putting one up. Nothing to lose but a little time/materials.