If you are one of the many presenters to have to do all of that on your own, I always suggest that you should never cram at the last minute.
This is a mistake.
Instead, as the presenter, it is your job to create the best environment for your audience to have a good experience, so taking charge of the space is crucial. If you need to move something, move it. If you need to write something on the flip chart or white board, do so.
If you become too deferential, it can be seen as a lack of confidence , which will undermine your authority and thereby your presentation as a whole!