I try never to show in black trousers, drool shows up dreadfully on mine lol
I am not a great fan of smart smart clothes either & have a pair of tweedy trousers & beige V neck top I wear.
Try Next for a non convential suit. Skirts suits are are ok too as long as you try them on & check that when you bend over to place feet your knickers aren't on show.. not a good look!!
All that said we had a handler for Lucy at Crufts who abandoned at the last minute so I ended showing her myself in a pair of jeans & a borrowed jacket!!
As long as you can run in your wedges/shoes they should be fine.. bear in mind that the recent hot weather is unusual - the norm being waterlogged rings so anything thats not flat sinks