I've got both running on my 770. Currently you won't be able to VPN in so maybethe Citrix client might be for you. If you're using it inhouse then RD is really fast and automatically scales the screen resolution down.
Otherwise the accessibility onscreen KB is the way to go.
It's easy to use an encrypted connection by tunneling the port 3389 over ssh. This is safe enough and easy to setup without root permissions on the 770.
-you only need to install ssh client,
-make a connection (before using RD) with the -L command and
-run RD to the localhost.
It's not a real vpn but it's easy to setup, runs through most firewalls and you only need a ssh server which is accessable from the internet.