Ron, we've never seen a patio kit for a little ramp like is on a side entrance. Is there a screen included in your side entrance? Maybe a pull-down located above the ramp?
I don't see a problem with the ramp handling the weight of two people on the ramp drinking coffee or whatever, but you don't have room for four people and chairs in a 4 1/2 by 8' area so why worry. At motorcycle rallies we usually see people with the rear ramp down being supported by 2 long home-made saw horses. I believe you will have to use your inherited ingenuity to devise the fence.
Jim in Memphis
Wife of 49 years is Brenda
2019 F450 6.7 Powerstroke
2017 Mobile Suites 40RSSA
2015 26TBUD Salem Forest River (For Alaska Trip)
2001 Road king w/matching Harley sidecar