I've repeatedly read that you should mix a powdered drink mix in the concentration suggested by the manufacturer because it optimizes your stomach's absorption of it.  Increasing the concentration could simply upset your stomach.  
If you end up buying a product you haven't used before--liquid or gel--I'd suggest doing a few trial runs with it to see how your stomach tolerates it.\
Good luck at your ride!
				
			 
			
		 
			
				
			
			
				Live with intention.  Walk to the edge.  Listen hard. Practice wellness.  Play with abandon.  Laugh.  Choose with no regret.  Continue to learn.  Appreciate your friends.  Do what you love.  Live as if this is all there is.
--Mary Anne Radmacher