I have had an AR150 for some time and would suggest that you take advantage of the latest GLI firmware as it has a "STAtion" manager tool which is really important when you use it in different locations. If you are not aware, there are issues with OpenWrt being able to access the WLAN when the configured WWAN is not available. Known issue. Search for travelmate.
That said, you are not clear on how you have configured the device. You should post links (for a new user change the first character of the URL) so we have a clue what your doing. I think you are referring to one of these links
https://wiki.openwrt.org/doc/howto/clie … modeissues
You should be able to use a newly flashed image with no modifications. Treat your hotel as an ISP. Technically you may double NAT, but it' is what it is. If you put yourself on the same subnet as the hotel (relayd,etc) you have no security. You will need to create a new WWAN (STAtion) to connect to the hotel SSID (uncheck the box at the top of the page or it will delete your WLAN) or use the cable (it's faster and hotels are pretty poor speed wise https://www.hotelwifitest.com/)
Another issue you may encounter is the hotels splash page or login. Once you connect, do NOT expect that opening a browser on your device will spawn the login, and NO you are not just lucky and skipping it. Enter the appropriate URL and authenticate (I save the URL as a short cut). I have found that sometimes I get short leases. It's not a seamless process and varies from hotel to hotel.
PC-Engines ALIX 2D13 CC 15.05 RC2 (Router - OpenVPN Server)
HooToo TM02 CC 15.05 (Travel Router - OpenVPN Client)
GLi-AR150 CC15.05/GLi 2.13 (Travel Router - OpenVPN Client)
Kingston MLWG2 CC15.05 (Travel Router - OpenVPN Client, mini-DLNA)