You leave it switched on when the van is in storage? I turn my "switched power" off when the van isn't on the road, which powers the router down.
I wouldn't feel happy having the extra power use, though perhaps if the router was on the "always live" circuit I could leave it running.
I don't use storage, so the van is within the home WiFi coverage anyway, but nothing is left switched on, except Bluetooth monitoring.
To connect to that, I have to hold my phone up to a window facing where the van is, so it's not convenient.