I started dieting in June and yes, this diet is easier in the summer. But now that I have switched to hot shakes and they brought out the porridge in Sept I find I am coping. Fruit teas help, and making up the water flavourings like Summer Berry and Orange hot, also makes a nice hot drink. Lots of peeps on here love boullion for a savoury drink, but I am not a big fan of savoury drinks or soups.
If you want to try the bars, I would try the peanut one first, as that has the lowest carbs. The variety just might help to get you through.