Question about setting up a repeater bridge with dd-wrt, i.e. ip addresses

I am working on setting up a repeater bridge using dd-wrt. My goal is to have the routers on the same SSID and have the devices (mainly phones and tablets) access the router with the best signal. I finally got the client router accessing the internet from the access point router, but I have not yet set up the virtual interface to allow for wireless connection s.

My question pertains to the host ip address on the client in regards to devices being able to see each other regardless of which router they are connected too. One guide I was using stated

quote:

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The router name and host name can be anything at all that you want, they can even be the same as eachother but preferably something different from your access point. The host name you give to this router is what will show-up in the list of connection of your access point, so it's useful to chose something you will recognize. You can always name it for the room it's in or what devices are typically connected to it. For the IP address, it needs to be in a different subnet than your access point. If your access point is 192.168.A.whatever, then this router needs to be 192.168.B.whatever. A and B must be different numbers. A typical configuration is to have the access point at 192.168.1.1 and the client (this router we are configuring right now) at 192.168.2.1

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So this is what I did and it is connecting to the internet. However, I also read that when assigning ip addresses, they need to be on the same subnet to allow for wifi-connected devices to see each other across the routers. Can someone confirm that for me? and if so, what should I assign as the host ip on the client and then when I get to setting up the virtual interface, how should I set it up to assign ips?

Also, if I am totally screwing the pooch on this one, let me know and I will go back to the google and try again hahaha Thanks.