You are talking about a different kind of setup.
If I'm at a hotel that provides only a wireless connection......I use one AirPort Express to "join" the wireless network and provide an Ethernet connection to the WAN port on a second AirPort Express (it could be an Extreme as well).
The second AirPort must be set up as a DHCP and NAT router. It cannot be in Bridge Mode. If I used Bridge Mode, at least two bad things would happen:
1) I would be able to "see" other devices from other hotel guests on the network....and they would be able to "see" my devices. I don't want this....I want a private network.
2) The hotel router would have to supply a separate IP address to each device on my network and the second AirPort would have to pass through all of that information. So, I would be relying on the hotel router for multiple connections.
With the second AirPort in router mode of DHCP and NAT, the hotel network only "sees" one device.....my AirPort. The hotel network does not see any of the other devices behind the second AirPort.....becasue they are all on a separate subnet.......yet each one has Internet access.
This type of setup has worked for years for me. I can connect as many devices as I want to the second AirPort, either wired or wireless.....and the hotel still only "sees" one device.....the AirPort.