If it a LSR i just leave the sugar at home - I just make sure I have a decent meal the night before, then wake, quick cup of tea and off.
Adding sugar/gels mid LR is going to interfere with you training yourself to burn fat more efficiently. If you are doing the long runs slow enough then you have plenty of fuel on tap. For a pacy long run, or 'dress rehersal' I take them. At least, that's my interpretation