My 3G+Wifi iPad2 won't ship until 4/20, but I may as well do some research ahead of time. One of the features I'm really looking forward to using is GPS. My gf and I often go hiking & biking, plan to do some sailing, and travel in a RAV4 to rural areas. 3G service may not always be available so I'd like a GPS app that uses pre-stored maps. I'm ordering a 64 GB iPad2, so space shouldn't be an issue. I have Garmin products, but they specialize and seem to deliberately hobble them. For example, my Nuvi won't record tracks which are important for hiking and back-tracking. I'd like my iPad2 to function as an all-purpose GPS (with a really large screen!). So, turn-by-turn driving instructions is an important feature (to replace my Nuvi) along with the ability to track and use terrain and marine maps. I'd appreciate any recommendations / comments on the best pre-stored map multi-purpose GPS application. Or, if one app doesn't do everything well, then which set of GPS apps? Also... mounts... I know the iPad2 is new, but I'll want a good car mount (particularly for a new RAV4). Any ideas?