Hi,
We carry a small IKEA stepstool with a knobbly top, which upsidedown inside doubles as a holder to keep our wastebasket stationary when traveling. It is also handy for hopping over a partner into bed.
Outside, depending on leveling needed, we can use nothing, the stool and/or on rare occasions a supplementary nearby rock.
We count this minimal climbing as a big FGRV blessing and often count the number of steps bulgemobile and stickie users must negotiate to get in and out of their rigs.
Des & Diane