I stay at a CG that has the sewer pipe WAY above the ground also.
The CG owner got tired of RV's driving over the sewer hookups and smashing them so now all the pipes are about 12 to 15 inches aboce ground.
I also highly doubt the CG owner will let you just wack off the sewer pipe! :B
The sewer hose that came with your RV will never be long enough for any CG. I found that out the first CG I pulled into with my new RV!
Do your self a BIG favor and go buy the Rhino Sewer hose kit and the side winder. With these two you will be able to hook up and have it drain properly. If you need more lift at your site pick up a couple of 1.00 flat patio blocks from walmart and put it under the side winder.
You can find both of these at most super Walmarts.
If you are new to RV'ing please note that you should NOT leave your black or gray tank valves open when parked. Let the both tanks fill 3/4 and then dump. Otherwise you will have mountains of poop hardening inside your tanks setting yourself up for just more problems.