Some Trump supporters were elected as state delegates. I think very few of the rookies state delegates put their name in on time to be considered a candidate for election as a national delegate.
You are very wrong about that. They were showing up to the County conventions and getting their names on the ballot. HOWEVER, there are enough Cruz supporters who are Party stalwarts that they won’t be needed. This isn’t like it was with Ron Paul when his supporters were all newbies. It’s going to be a very interesting election on Saturday.