There is no perfect tie out - they all have their issues, and with 4 dogs, you will spend more time untangling them that you will relaxing. The other issue with them is that the majority have extra long lines which can often be longer than the space of your site creating a nuisance. Running lines between trees, etc. can place the dogs in inconvenient spaces.
For me, I have two dogs and use a double leash with them. The ends attached to the dogs are about 18 inches long so they can easily wander and switch sides. Then I attached a 6 foot leash to the connector. I simply hook the end of the leash to the chair I'm sitting in, or my foot, RV door, etc. I have found this to be the easiest solution.