Also, be advised that Wireguard uses randomness to establish enough entropy to raise the connection. That randomness is provided by WiFi noise in most Atheros devices (especially those without a built-in Random Number Generator). So if your WiFi is down, those random numbers are never picked from the air, and your WG interface takes more time to raise.
I tried the travelmate package, but I think the wireless AP is still down while it is scanning for the "WAN" wireless and thus does not enable the "LAN" wireless.
It was working fine at home, but when I hopped on the train it obviously didn't join my home wireless network and the lan essid never came up.
I've disabled routing over the wireguard VPN for the time being as I've got another issue with it.