Review & Recommendation
The best overall system for both navigation and geo tagging your images is established by using a Bluetooth GPS by Bad Elf and the Foolography Bluetooth camera module. With this system you can user the Bad Elf GPS receiver to track your location on tablets and phones as well as within your camera. Imagine one GPS that allows up to 10 Bluetooth connections. I've tested the system with iPAD and iPhones and with my Nikon D4 and D800 cameras. See the links below for more information on each product.