Is the base of product Stable?
Yes, although the base it empty. After filling it with cement,sand,small pebble or small cobble. it will be stable, it can help you control crowd.
Im worried about whether to ship the base, pole, and rope together? Because I need to use it as soon as possible.
Yes, All the things will be delivered at the same time, it will not delay your use.
If I received the pole and find the pole has been bent or dented, what should i do?
Generally, such issues are unlikely to arise. I will send you the goods with reliable packing.