Table:
text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
AA9 Badger Primitive 1 1 17 A/L
AU9 Blacktail Canyon Wild 1 2 12 A/L
BN9 Boucher Primitive 1 2 23 A/L
LB9 Boysag Wild 1 2 12 A/L
LK9 Burnt Point Wild 1 2 12 A/L
SA9 Cape Final Threshold 0 1 6 D/S
SA9 Cape Solitude Primitive 1 2 23 A/L
BC9 Cardenas Primitive 1 2 23 A/L
SB9 Cedar Mountain Threshold 2 2 34 A/L
AJ9 Cheyava Wild 1 2 12 A/L
AF9 Chuar Primitive 1 3 29 A/L
AK9 Clear Creek Threshold 1 3 29 A/L
CBG Corridor-Bright Angel Corridor 2 31 90 D/G

text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
CCG Corridor-Cottonwood (Summer) Corridor 1 6 40 D/G
CCG Corridor-Cottonwood (Winter) Corridor 1 1 8 D/G
CIG Corridor-Indian Garden Corridor 1 15 50 D/G
BG9 Cottonwood Creek Primitive 1 2 23 A/L
BJ9 Cremation Primitive 1 2 23 A/L
AX9 Deer Creek Primitive 1 1 17 D/S
LG9 Diamond Creek Wild 1 2 12 A/L
SF9 * Eminence Break Primitive 1 1 17 A/L
AY9 Esplanade Primitive 1 2 23 A/L
AZ9 Fishtail Wild 1 2 12 A/L
BS9 Fossil Wild 1 1 1 A/L
BR9 Garnet Primitive 1 2 23 A/L
LM9 Grand Wash Cliffs Primitive 1 2 12 A/L
BH9 Grapevine Primitive 1 2 23 A/L

text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
AG9 Unkar Wild 1 2 12 A/L
AH9 Vishnu Wild 1 1 11 A/L
NA0 Walhalla Plateau Primitive 1 3 29 A/L
LI9 Whitmore Threshold 1 1 17 A/L
NF9 Widforss Threshold 1 2 23 A/L

text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
AL9 Greenland Springs Wild 1 2 12 A/L
BE9 Hance Creek Primitive 1 2 23 A/L
BM7 Hermit Loop-Hermit Creek Threshold 1 3 29 D/S
BM8 Hermit Loop-Hermit Rapids Threshold 1 1 17 D/S
BL4 Hermit Loop-Horn Creek Threshold 0 1 6 D/S
BL5 Hermit Loop-Salt Creek Threshold 0 1 6 D/S
BL6 Hermit Loop-Cedar Creek Threshold 0 1 6 D/S
BL7 Hermit Loop-Monument Threshold 1 3 29 D/S
BL8 Hermit Loop-Granite Rpaids Threshold 1 2 23 D/S
BL9 Horseshoe Mesa Threshold 2 3 40 D/S
SI9 * Jackass Primitive 1 1 17 A/L
LA9 Kanab Creek Primitive 1 2 23 A/L

text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
LJ9 Surprise Wild 1 2 12 A/L
AM9 Surprise Valley Primitive 1 1 17 A/L
NJ9 Swamp Ridge Primitive 1 3 29 A/L
BB9 Tanner Primitive 1 3 29 A/L
AW7 Tapeats-Upper Tapeats Threshold 1 2 23 D/S
AW8 Tapeats-Lower Tapeats Threshold 1 1 17 D/S
AV9 Tapeats Amphitheatre Wild 1 2 12 A/L
LC9 The Dome Primitive 1 2 12 A/L
NB9 Thompson Canyon Primitive 1 3 29 A/L
NM9 Toroweap Valley Threshold 1 2 23 A/L
LF9 Trail Canyon Wild 1 2 12 A/L
AQ9 Trinity Creek Wild 1 2 12 A/L
NL9 Tuckup Point Primitive 1 3 29 A/L

text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
NK9 Kanab Point Primitive 1 3 29 A/L
NC9 Ken Patrick Primitive 1 2 12 A/L
NN9 Lava Threshold 1 1 17 A/L
AE9 Nankwoeap Primitive 1 2 23 A/L
BU9 National Wild 1 2 12 A/L
AS9 North Bass Primitive 1 1 17 A/L
BT9 Olo Wild 1 2 12 A/L
NG9 Outlet Primitive 1 2 23 A/L
BA9 * Palisades Primitive 1 2 23 A/L
LE9 Parashant Wild 1 2 12 A/L
SE9 Pasture Wash Threshold 2 3 40 A/L
AP9 Phantom Creek Wild 1 2 12 A/L
NH9 Point Sublime Threshold 2 3 34 D/S
AT9 Powell Plateau Primitive 1 2 23 A/L

text: Grand Canyon Backcountry Camping
Backcountry Zones
Grand Canyon 
 Zoning and Use Limits
Area Name_ Zone_ Groups Parties Max_People Camp_Type
BD9 Red Canyon Primitive 1 2 23 A/L
AB9 Rider Primitive 1 1 17 A/L
ND9 Robbers Roost Primitive 1 3 29 A/L
BP9 Ruby Primitive 1 2 23 A/L
AD9 Saddle Canyon Primitive 1 1 17 A/L
SH9 * Saltwater Wash Primitive 1 1 17 A/L
AR9 Scorpion Ridge Wild 1 2 12 A/L
LH9 Separation Wild 1 2 12 A/L
SG9 * Shinumo Wash Primitive 1 1 17 A/L
BO9 Slate Primitive 1 2 23 A/L
LL9 Snap Point Primitive 1 2 12 A/L
BQ9 South Bass Primitive 1 2 12 A/L
AC9 South Canyon Primitive 1 1 17 A/L

Question: Which zone has a maximum capacity of 23 in a group under 2 at Robbers Roost at Grand Canyon Backcountry Camping?