If you need a tripod but do not want to carry a huge and heavy one. I have a solution for you. A JOBY GorillaPod. It is a small and flexible tripod that can grip on to anything. You can for example tie it around a tree branch or a chair. I bought one because I like to take things that might be on the ground or near the ground. Then this tripod is the perfect choice. There are many versions of this tripod. The one on the picture is for a DSLR camera with a big lens. Even though it might look small, it is strong and stable to put the camera or the lens on.
I used it to take long exposures of this small waterfall. It worked fine and the result can be seen below:
This tripod is also good for macro. If you see a insect on the ground or on a leaf then this will be helpful. I usually take those pictures without a tripod but after awhile you will get pain in your knees and in your hand/wrist. This tripod will take care of that problem. The best part is that it can fit in any camera bag. It weighs around 0.5 kg (11 pounds). It is 29 cm long (11.4 inch) and can hold up to 3 kg. It cost from 18$.