I did not see anywhere if you guys are running DC or DCC. If you run DCC, the absolute simplest solution is a Frog Juicer. 3 wires to connect and forget it. To my knowledge there is no such device for DC which has to rely on analog switching. Although I run DCC and use Frog Juicers on remote turnouts, I have made a simple device for all my in reach ones. Here’s a short video about how I do it. These will work fine on DC.
Peter