First Time Sedation

Went to a new dentist for a cleaning a few months ago. Had several fillings with cracks and decay starting around them. He wanted to do two crowns because he feels the old dentist drilled too much out of those two teeth and I had several new cavities. All in all I think there were 8 issues that needed to be addressed.

I go on Tuesday for the procedure and was prescribed valium for the night before, something starting with a t an hour before I go in and the said he would give me gas until the IV sedation was started.

Is it safe to assume I will not feel a thing or Remember any of it ?

That's right. IV sedation puts you to "sleep". You won't remember a thing.