If the batteries are of the same type, i.e. both are NiMH or both are Lithium-ion, then you can use a higher capacity (i.e. higher mAh) battery instead of the lower one. The reverse is also true.
People visiting Table Rock are not allowed beyond the Mill Creek Watershed boundary, which is clearly marked with numerous signs. As mentioned earlier, the Mill Creek Watershed is a closed watershed and no public access is allowed, as it is the municipal water source for the city of Walla Walla, Washington.
The headwaters of the river are near Chattahoochee Gap in the mountains of north Georgia. The river begins its journey as a small stream five miles from Brasstown Bald, the highest point in the state of Georgia. The river's journey begins at an elevation of over 3500 feet above sea level, and ends in the Gulf of Mexico.