We have not found an rv park extremely convenient to Dallas. There are several parks north of Dallas between Denton and McKinney. We have also stayed at the Army Corp of Engineers park at Lake Lavon east of Plano and the city park near Lewisville. There is also a KOA on South Cooper north of I 20 in Arlington. Would probably have to check their website. I've found Koas fairly expensive especially near metro areas.