umm if you are low lvl i would recommend rock crabs seeing they wont hit u as often, any multi combat where things cant hit u or hits u low is a good place.
I hate it when people bring those to the rock crabs T_T but yeah its easily the best place to bring a cannon. TBH, I've brought my cannon there a few times. Usually me and some other guy would both pull out our cannons and try to even kick each other out... its pretty crazy.