Landing at Grand Prairie, be aware of the stadiums and Six Flags in Arlington, just NW of GPM (sports TFRs) and that DFW Class B goes down to the surface at Interstate 30. Also, approaching from the west, Arlington (KGKY) is very busy and has lots of traffic. Talk to KGKY tower and have KGPM tower in standby for the very quick flip flop. Asking to cross mid field over KGKY above traffic pattern altitude, just south of I20, and switching to KGPM over KGKY will set you up perfectly for a left base when GPM is landing north, or a Left downwind entry when landing south.
Both KGKY and KGPM are on the sequestration tower closure list. So check NOTAMS and FSS before flight (as usual) and be prepared to do the above over CTAF.