While I don't use it myself (yet), I've been told that Cloak provides one of the best, most hassle free, VPN solutions for iOS. One subscription covers all your computers and/or mobile devices.
The advice came, mostly, from a person who can and does set up his own VPN servers, but found Cloak to be much easier to deal with when traveling.
While I would imagine the primary purpose of the iPad VPN client is to connect to corporate networks, if you have a decent home router that offers a VPN server, such as the higher end of the Draytek Vigor range, you can set up your iPad to Setup a VPN tunnel to your home network, through which you can browse. I usually do this when I'm using open Wireless networks. Strangely VOIP apps sometimes work better through this route than directly via the open network.
If your primary purpose is to obfuscate your origin, then a number of paid VPN providers are available offering servers in various countries