As a fellow owner of this particular t-shirt, the only 2p coins I have to throw in would be...
Load NOTHING! Make the rest of the band wear the roadie shoes for a while, and milk it long afterwards!
Tick the 'park it firmly on a stool and use the electric' box until damn sure otherwise.
The most important factor in any of it is (IMO, of course) is any stressing about literally anything. I personally don't suffer the nervous gig disease, so have a word with that bloke in the mirror and if there's any worrying about any aspect of the whole thing, tell him to stay home.
I had my little event on a Thursday afternoon and was considering playing a festival on the Sunday. Showing your face locally can have it's downsides - my cardiologist told me in no uncertain terms NOT to go, and as her son's band were on after us she'd find out! I had a week off.