Angel- It depends on the show. Nationals type show you dress more fancy plenty of bling. After coming from showing big horses for a long time, I catch myself looking at the fancy show jackets from Hobby Horse etc and thinking about them, but for a regional or local show they are to fancy. I show in a nice suit type jacket with pockets for treats etc for baiting. Generally I try to find a jacket that is a little longer because I am short and fat. LOL From your avatar you can get away with a shorter jacket, (your so lucky). As for driving, it depends on the style of horses and the time of day as to how much you dress up for it. I am breaking over to the pinto this year, but have friends who show pinto with their minis and they are telling me it is the same. What breed of Mini do you have?
Jackets, settled on buying a plum, burgandy, dark green, or would love teal but after the horses rub off their makeup it would be teal with black oily splashes. I think any of these colors will work with all the horses even my new little silver buckskin (the one that I was worried the most about cordinating with).