I fish and live in Coppell TX. I fly fish in Coppell's ponds on almost a daily basis year around. I use weights 2 to 7/8 but mostly I like to fish a 3 wt or a 4/5 wt 7ft rods.
I catch bass, blue gill, green sunfish, catfish, crappie, drum and an occasional carp.
The ponds are located in Andy Brown with the further East pond being my
favorite; I haven't fished the ponds on the West side very much, I live closer to the East ponds.
There are four ponds on Freeport Ave that I frequently fish. These are industrial drainage ponds.
There are other lakes and ponds in Coppell I haven't fished because I haven't the time.
Coppell is located adjacent to the DFW airport, to give you a reference point.
In addition to Coppell, I sometimes fish LLELA in the winter but it could be fished year around if one wanted to. I turn to LLELA if we have a cold winter and the fish get
sluggish in the ponds. LLELA stands for Lewisville Environmental Learning Area and is located at the Trinity River Dam on Lewisville Lake. There are also a few creeks
around that can be waded and fly fished.
The Trinity River runs through Dallas and that creates fishing opportunities, many of which I believe go untapped.
If you like trout fishing, you can reach Tishomingo Oklahoma in a couple of hours from Dallas and fish the Blue River which is stocked with trout in the Winter.
This blog will give you information:
http://prairieoceanflyfisher.blogspot.com/Good luck with your fishing in Dallas, I am sure you will enjoy it. Don't hesitate to ask more questions.