Let's start with the hose. Water runs down hill through the hose carrying what ever waste material that has been deposited in it, whether its dish water, shower water or toilet water. (Not the kind you splash on your face!) If there is a rise in the hose the water will slow down or stop, depending on how high the rise is, allowing solids to settle in the hose. Thus you have to provide an adequate slope from the discharge point of the rig to the sewer facilities of the park. I have seen a lot of ways that people have met this challenge. The first is by using a device such as expandable hose support or the telescoping hose support, neither of which is going to break the bank to purchase. However, DIY'ers like to do things on the cheap. I have seen people take a 1"x4" board, support it on a couple of rocks and ziptie the hose to it. A little too basic for me. I prefer to see simple and easier DIY fixes. Such as the folks that use 4" PVC sewer pipe supported on concrete blocks or folks that use PVC house guttering. Either way supports the hose and provides the proper slope.
And then there is the sewer attachment. Most these days use a threaded connecting point to provide a gas tight connection. However some older parks may still use the unthreaded connection that requires a sewer sponge ring to provide a gas tight connection. Either way most modern RV sewer hose fittings can accommodate either.
Now let's recap. The grey and black water exit your rig, flow down hill to the sewer connecting point and discharge safely and sanitarily into the park sewer. Ta-Da!! That was easy, wasn't it! And you don't even have to go outside and lift the hose off of the ground to drain it into the sewer!
Use what you have learned, and if you can add anything use the "Comments" butten and let us all know.