DH will certainly feel your pain. He did a similar break of our gray water pipe on day 1 1/2 of our last trip out last fall. Came out of a drive too fast. The drive had a dip in the center and sure enough the gray water pipe took a nasty bang.
Thank goodness it was "just" the gray water.
Getting access to that low slung beast sure was a bear when he spent half an afternoon on his back to temporarily wire that pipe in place until we got home. Word to the wise: keep a well stocked tool bag. Wire, zip ties, and other fasteners are your friends.
I did get a few photos that we can now laugh about --- just feet and an arm sticking out from under the MH, waiting for a tool hand-of from his silent, able assistant.
We did go ahead with the trip and had to make sure we put a bucket under the break when in camp. Fortunately we were able to get by with just washing dishes once a day and not generating a lot of gray water. What water we did collect was handy for putting out the camp fire. (Not what we would normally do, but what else was there.)
Once we got home, DH spent a day in the farm shop with the MH up on the heavy equipment hoist. He would have been saying lots of words we don't let our children say, were it not for the hoist. The actual fix wasn't that hard, mainly replacing some PVC pipe. Fortunately the tank had not gotten damaged. Indeed he found a few places that lacked proper glue from the factory, but hopefully all is well now.
As you said, drive VERY slowly coming out of drives. Pick you exits carefully. It is far too easy to bottom out. Hope Axis/Vegas owners heed your advice. It can save some serious grief.