"So if I'm understanding all this right, it's a bad idea to put on an excluder and then nothing but undrawn foundation above it? "
yes.
"I was going to do that this year since I don't have any old drawn foundation to work with. Will they refuse to draw it out?"
best results, excluder left off.
"Another alternative might be to allow them to mostly draw one super, and then put a queen excluder beneath it and another super (or two) on top of that. Only thing there is I would have to be very careful not to trap the queen above the excluder, in case she wanders up there once the comb is drawn."
timing, when the foundation is drawn then place the excluder on. even if you happen to get behind and the queen lays up in it, just make sure shes not up there, place an excluder on. the bees will take care of the brood in that super and when all has hatched, the bees turn it back into honey storage.