"tropical36".....That's a nice oil change unit, but may make things kind of complicated. I added a Fumoto drain valve to mine and just slide the Rotella containers (saved from previous oil change) under the Fumoto valve and fill the container, shut off valve and cap. Situate the next container, fill and cap. Once done, I drop off the Rotella containers at an auto parts store and I'm done.
For the oil filter, I just use a regular drain pan, but usually only have a small amount drain as I drop the filter straight down.
Lastly, when I get any large boxes, I cut them up and save 3' x 3' pieces to use under the coach in case there is any spillage. If there is I toss the cardboard.