I have put my name on the draw, will see how we go on wednesday and if I don't think he's up to it I wont do it.
I'd say go for it. Like your trainer told you, it can't hurt to try. The other competitors and the judges too should understand. Besides trial and error can be the best way to learn sometimes.
... no comment.
I agree with Spyder. Why would you want to push the horse, skip training the basics and end up with an overfaced horse, nervous about collection?
Take your time, develop his muscles and try next year when you know that you can put in a respectable test.
And no, the judges will not be "understanding" to your situation. They will probably talk about you all show, and not in a good way. I have worked at shows and scribed for judges enough to know that they don't appreciate riders who push their horses too fast and overface them.
Trial and error is a valid method with some things, training horses it is not. If you make a big error, the horse may not ever forgive you. Educate yourself and your horse properly. Showing should exist only to confirm your training, not be the object of it.
PS. Lol Skyhuntress :P :P I know how you feel! Rowan enjoys rocketing me out of the saddle every stride when he gets excited....