I use a TP-LINK TL-MR3020, an awesome little travel router (also used for the PirateBox/LibraryBox projects). The MR3020 is also powered by USB so as you can see you can just use one USB wall-plug (or a portable power solution, maybe solar).
http://192.168.0.254/, the name/password are admin/admin (of course you will change this). Here you can change the name of the AP if you want.
A useful thing to do is assign you RasPi a fixed IP when connected to the MR3020.
- Connect the RasPi to the MR3020 via the ethernet cable.
- Connect and login to the MR3020 with your laptop (over WiFi).
- Click DHCP on the left then Attached Devices.
- Copy the Mac-Address of your RasPi.
- Click Reserved Addresses then Add.
- Paste in the Mac-Address and give you RasPi an IP (something like 192.168.0.176).
This way when you SSH into your RasPi you will have an easy to remember IP.
I use JuiceSSH on my NVIDIA SHIELD to SSH in (ConnectBot is a free app).