what do I need to do to my suspension

Have an 09 4x4 trd sr5 dclb. It rides and and looks just right as is. With the exception of just a bit of axle wrap when stopping

I plan to start carrying my 750 magna (about 550 lbs) in the bed + about 70 lb of kayaks on the roof rack. The most off roading I'll be doing may be some pretty rough fire roads, mostly dry, but sometimes during a storm.

Read a lot about sagging and breaking leaf stock leaf springs, so how do I prevent that?

Single aal? 3 spring aal? air springs? with or without on board air pump

Any thoughts aprreciates

 

I would either get an alcan leaf pack, or air bags.

 

MONEY

 

Axle wrap with a stock truck?

 

I rock the wheelers 2 in single aal with the stock 3+1 leaf pack and it made the pack what it should of been like from the factory as far as load handling and ride.

 

common because of how weak the stock leafs are.