I have the shooters connection backpack and a range cart from Zuca. The bag holds everything I need the cart is awesome nice and rugged you can sit on it like a chair.
The only time I use any of the stuff in my bag Is on a practice day if the gun causes me issues. Put all of your gear in a pile and don't get anything any bigger then you need on the range. Pack a second bag up with the just in case stuff and leave it in the car.