Would this be weird......................?

I am uming you are talking about riding in the warm up pens in english tack, not actually entering the HUS cles? If that is the case, who cares if you look out of place? The warm up pens at Congress are extremely crowded, so I doubt anyone will actually notice. Best I remember, the last time I competed at Congress (which was about 9 years ago), you will have a designated warm up time to be in the pen you will compete in, so you will be with other barrel racers at that time, but the warm up pens are open to everyone at all times, so you will be riding with people competing in several different events. Do what will make you perform your best, if that is to ride english, then by all means, do that.