I did as a RN when I worked on the flight crew, and yet as a FNP, no I would not. It is not within my NP scope of practice. Since I know how and am technically adept, I guess I could and would probably be OK since the usual guideline is "what would someone with your level of education and experience do."
However, since we do not have ET tubes in the family practice clinic, I am saved from making such a decision, lol. I would just BVM and call 911!
In my state FNPs routinely work in hospitals in a ACNP role, so if I ever accepted such a position, yes, I would go back to tubing people. It is really not a big deal you know. It's a much larger "lumen" than a vein and I bet you calculate those all the time!