[BroadHopper]

In case of the family cabin, a competent plumber actually set up all the pipes to drain back to the pump by shutting off the pump and open all the faucets. When flushing the toilets make sure the flush stays open. Works like a charm for decades! Of course we fill all the sewage traps with antifreeze.
Mice eventually will tolerate moth balls, dryer sheets, Irish Springs etc. So the Maine mouse trap is your best bet. Trouble with poisoning mice will go off and die in places that will scare the missus to the point of no return. The mouse traps are fine, just get the strong plastic ones, the wooden ones don't snap hard enough. You have to go back and reset them. If you have electricity, those electric rodents eradicators on every floor works fairly well!
Make sure all food are in glass or metal containers. Mice eat cardboard and plastic. Don't leave paper around, mice uses them to make nests. Same as clothing, towels and bedding. Best to bring them home or store them in cedar chest or wooden boxes with moth balls/lavender combo balls found in your local hardware stores.
Only other thing you need to worry about are lady bugs and or bats. That another chapter to discuss.
Welcome to seasonal living in the Granite State!