Complex sentence: Aside from the reservoir outside of Del Rio for fishing and some lake diving, most forms of recreation are either in the town of Del Rio or across the border in Ciudad Acuña, however current DoD policy does not allow travel across the border for military personnel.
Split into simpler sentences: Aside from the reservoir outside of Del Rio for fishing and some lake diving, most forms of recreation are either in the town of Del Rio or across the border in Ciudad Acuña. Traditionally this would be true however, current DoD policy does not allow travel across the border for military personnel.