Yes, there is access to the charger port without removing the tablet from the case. The opening is on the right side of the product, just under the handle. The handle is a little bit in the way but it can easily be bent out of the way.
iPad 4 fits better than the 3 because older style connector was difficult to plugin as the iPad 2-3-4 float in the case a tiny bit. It still provides great protection though. We just switched over to an m case as my 3 year can finally carry the iPad instead of dragging it.