For those camping on the cheap, here are some great campsites we found near Murray River National Park, SA.
#10 Lock 5
35 minutes (47.3 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Boat Ramp Nearby
 - ✓ Phone Reception
 - ✓ Fishing
 - ✓ Allows fires
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#9 Yamba Overnight Stop
Sturt Hwy, Yamba, South Australia31 minutes (42.1 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Phone Reception
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#8 Cobdogla Pump Station
South Australia35 minutes (38.2 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Phone Reception
 - ✓ Fishing
 - ✓ Swimming
 - ✓ 4WD Trails
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#7 Wunkar
Main St, Wunkar, South Australia31 minutes (36.9 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 
#6 Rilli Reserve
3 hours 42 minutes (36.6 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Boat Ramp Nearby
 - ✓ Phone Reception
 - ✓ Fishing
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#5 Lake Bonney Shoreline
34 minutes (36 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Boat Ramp Nearby
 - ✓ Phone Reception
 - ✓ Fishing
 - ✓ Swimming
 - ✓ Allows fires
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#4 Pata Roadside Rest Area
2159 Karoonda Hwy, Pata, South Australia25 minutes (30.4 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Phone Reception
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#3 Milich's Landing
18 minutes (17.4 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Boat Ramp Nearby
 - ✓ Phone Reception
 - ✓ Fishing
 - ✓ Swimming
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#2 Thiele's Sandbar
10 minutes (8.4 km) drive from Murray River National Park
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              - ✓ Pets Allowed
 - ✓ Free
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Phone Reception
 - ✓ Fishing
 - ✓ Walking Trails
 - ✓ Swimming
 - ✓ Allows fires
 - ✓ Telstra 4G
 - ✓ Optus 4G
 
#1 Loxton RV Park
- ✓ Free
 - ✓ Phone Reception
 - ✓ Telstra 4G
 - ✓ Optus 4G