I had to remove mine in an 05 Tiffin, and yes it is a job. The tanks on top have to be strapped up as they sit on the fresh water tank
I had to remove mine to replace the floor, do not know why you are removing yours but if it is for a hole, leak, and you can see it they can be patched.
This was for a Tiffin 05, so i don't know what has changed since then.
2017 Dutch Star 4369
2011 GMC Canyon, 2006 Jeep Wrangler TJ Golden Eagle