what can be done to extend deck staining lifetime ?

Do I need to add wood filler to cover the little cracks before staining? 

any special stain ?

It would be nice only need to stain this every 5 years or 8 years.

 

I googled. "

Staining and sealing

• Use a high-quality stain: 

  Choose a product with built-in UV protection to minimize fading. Oil-based stains often penetrate the wood better, creating a longer-lasting finish, says Think Wood. 

   
• Apply a sealant: 

  After the stain has been applied, add a high-quality sealant that is compatible with the stain to protect it from weather and water damage, according to Absolute Home Services. 

   
• Reapply stain as needed: 

  Depending on the wear and tear, reapply the stain every one to three years following the manufacturer's recommendations. " 

   

   

   

  every 1-3 years? How do I have that much time for rental?