I did not find the CMs to be rude at all, they are very business like. I will say they are not "typical" kiss your butt CMs, but, few in the horse world are. They try to get the attention of a bunch of people who do not wish to listen. They go over the basics over and over and over, and, no one listens. Makes me nuts. Even if the horses at Disney are very gentle, they are still horses, and they can be very dangerous. The CMs are there for your safety and the safety of the animals. I can see where that could be construed as being rude, but, trust me, they are not.
They line the horses up according to what horse likes to be where in the line and what horse likes to follow which horse, or what horses don't get along. Again, all in the name of safety.
So, tell them that you would like to be together and they will keep you that way.
They also line you up according to ability. I got a horse that could not stand to be behind any other horse and could be a bit rowdy when you put some leg on him. Personally, I thought it was fun, but a real "greenie" would have been a bit edgy. But, they tell you not to do anything but neck rein.

You won't need spurs, whips, or leg, just sit and relax and enjoy.