That's all I use. An old towel for the most part.
Our porch actually is screened in, but that does little to stop the rain. If it were bigger and not exposed to the salt air, I'd try to put something nicer out there. But we never entertain out there. It's just my outside man-cave for the most part.
I live in a condo complex across the street from the beach. While there are plenty of permanent residents here, some units are rented to people on vacation. One night I was smoking cigars, drinking (maybe getting a bit stoned) on the porch when I just got completely nauseous. (Very occasionally if I smoke a very strong cigar too quickly, and I'm also stoned and drunk this happens. Age has its downsides.) So anyway, I new I was going to puke and there was no way I was going to make it to the bathroom. So I rushed off the porch and tossed my cookies in the bushes.
"GO INSIDE?" came the voice from the condo on the 3rd floor.
"Thank you for your concern." I replied.
I felt bad for anyone who had to experience that (they probably didn't see me, but heard me), but is that really your first reaction to someone in distress? "GO INSIDE"? What I get out of that is, "Go die in your condo please, I'm on vacation." Some people really lack compassion.