I have a bed extender. So I fold the bed cover, or take it off for longer trips, extend the bed, rest the bikes against side of the bed and strap them down. I had 5 bikes in the bed last weekend and plenty of room for coolers, tents, chairs etc. If it's just a quick trip with an empty bed, I'd lay them down flat.
	
		
			
		
		
	
				
			 
	 
 
		

 
 
		 
 
		 
	 
	 
 
		 
 
		 
 
		 
					
				 
						
					 
 
		 
 
		 
 
		



 
 
		 
 
		


 
			 
			 
  
  
  
  
  
  
  
  
  
 