First leg of the journey:

• Load 1000,
• Drop 4 bananas every mile for 200 miles, feeding the camel from own supply.
• The route is primed for 4 passes of the camel:
• return
• take another 1000 bananas
• return
• take remaining 1000 bananas.

Second leg, starting with mile 200:

• load 1000
• drop 1 banana a mile away, then 2 bananas every next mile for another 333 miles, for 534 miles total.
• return
• pick 1000 bananas
• on the first mile eat a banana from own supply, then continue using the ones left.
• arrive at 534th mile with 999 bananas.

Third leg of the journey:

• load 999
• use up 466 bananas from own supply for the remaining 466 miles.

You're left with 999-466 = 533 bananas.

First leg of the journey:

• Load 1000,
• Drop 4 bananas every mile for 200 miles, feeding the camel from own supply.
• The route is primed for 4 passes of the camel:
• return
• take another 1000 bananas
• return
• take remaining 1000 bananas.

Second leg, starting with mile 200:

• load 1000
• drop 1 banana a mile away, then 2 bananas every next mile for another 333 miles, for 534 miles total.
• return
• pick 1000 bananas
• on the first mile eat a banana from own supply, then continue using the ones left.
• arrive at 534th mile with 999 bananas.

Third leg of the journey:

• Feed the camel the last banana on the ground, then starting with 535th mile, keep using bananas from your supply of 999.
• use up 465 bananas from own supply for the remaining 465 miles.

You're left with 999-465 = 534 bananas.

First leg of the journey:

• Load 1000,
• Drop 4 bananas every mile for 200 miles, feeding the camel from own supply.
• The route is primed for 4 passes of the camel:
• return
• take another 1000 bananas
• return
• take remaining 1000 bananas.

Second leg, starting with mile 200:

• load 1000
• drop 1 banana a mile away, then 2 bananas every next mile for another 333 miles, for 534 miles total.
• return
• pick 1000 bananas
• on the first mile eat a banana from own supply, then continue using the ones left.
• arrive at 534th mile with 999 bananas.

Third leg of the journey:

• load 1000
• use up 466 bananas from own supply for the remaining 466 miles.

You're left with 999-466 = 533 bananas.

First leg of the journey:

• Load 1000,
• Drop 4 bananas every mile for 200 miles, feeding the camel from own supply.
• The route is primed for 4 passes of the camel:
• return
• take another 1000 bananas
• return
• take remaining 1000 bananas.

Second leg, starting with mile 200:

• load 1000
• drop 1 banana a mile away, then 2 bananas every next mile for another 333 miles, for 534 miles total.
• return
• pick 1000 bananas
• on the first mile eat a banana from own supply, then continue using the ones left.
• arrive at 534th mile with 999 bananas.

Third leg of the journey:

• load 999
• use up 466 bananas from own supply for the remaining 466 miles.

You're left with 999-466 = 533 bananas.