By all means, go ahead and do it then.
I'm just saying that's how I would personally feel if I'd put in the
hours of graft to organise a show. I'd say no to you.
Not trying to spoil your fun.
When I do my stall at events, I ask the organisers for permission to display flyers for other events that I will be at. So far, they've all been fine with that, but I wouldn't dream of asking them if I could put out a collection box to raise funds for another event.
Respect. Doesn't cost a penny. If that's taking it too seriously, I'm happy to be too serious