Many people on the Island have small dogs and I see them walk by on the beach every day. Usually only one though.
Having said that, there are many people here who own dogs and do not keep them under control. To compound the matter many of these dogs are pit bull or have pit bull in them and can be menacing. I have a medium size dog who weighs about 55#. He has been attached several times even while traveling in my vehicle. I mean with the vehicle in motion. My dog has never been hurt until recently and that seems to be healing just fine. A friend of mind has had similar experiences and he has the same size and breed dog as I. He now carries a stick anytime he is walking his dog.
A lot will depend on just where you live but in any case you will not be able to let your dogs outside on their own safely unless you have a secure yard. With caution you should be alright but 3 small dogs is a lot to keep a close watch on and it happens quickly.