ASA 5505 Site to Site VPN Won't Reconnect

I'm two weeks into being stuck on this, thanks in advance!

So we have a central office with a 5505, and several sites around town with 5505s all setup for site to site. ONE (and only one) of the locations will disconnect after ~13.5 hours of uptime (23768 secs), and then stay offline for 7 hours (25200 secs) and then repeat. I can get it to reconnect by logging into each ASA and clicking "logout" of the VPN sessions and forcing a reconnect (ping traffic comes back in about 10 minutes).

I've spent hours pouring over the configurations, looking for timeouts, mismatched handshakes or protocols, and just haven't had any luck. Top it all off with the fact this works at all the other sites.

Anyone know of this behavior and how to fix it??

edit: I'm not sure what people here will want/need to see, so if you'd like me to "show run" something and post it don't hesitate to ask!