How do I use RemotePC to access a Mac from an iPad?
Macs come with VNC automatically, no additional install. If you can trust everyone on your local network and your VNC ports are closed on your router/firewall, then I would just turn it on. There is a check box under advanced remote management or remote desktop options that says something about allowing VNC users to log in. There's an optional password field. I use iTeleport then to VNC into my mac. There are other cheaper VNC programs too, but iTeleport is pretty excellent.