You're not literally six inches from them.
You're not right next to them all four hours.
You have plexiglass between you (no?).
You have air flow whisking away all the breaths and such.
I realize you're a few years older than me, but I feel okay in a cart. And I will still get out and walk a good bit, and if we're parked, I get out.
But, walking is not a bad choice at all.