Well you are 5 or 6 miles north of my house. There are plenty of ride possibilities in your area if you are going solo. I'm not aware of any groups that meet in that area although there are groups that meet elsewhere in the summer and ride through that area.
The easiest route for you to get 30 miles is to ride from the hotel west to Macarthur, south on macarthur to kinwest parkway, follow kinwest to the west to royal lane, then follow royal lane to the northwest until it ends. Royal lane and kinwest are good roads with very light traffic.
If you check the map on google or something similar, almost all of the roads west of macarthur and between 114 and 635 have light traffic and are good for riding. Similar for roads west of beltline, north of 635, east of highway 121.
You can check the GDB website to see if there are any group rides mentioned.
It is pretty cold here now but should be better by next weekend.