It depends on your risk tolerance. If you want to have the strongest case - send everything. Technically, USCIS can issue RFE if not happy with evidence submitted initially. If you're filing electronically, what's even a problem uploading everything, since you're not even printing stuff?
I do not think N-400 is "easy". It's the most important step of immigration journey, when entire history is reviewed and the greatest immigration benefit is given. I wouldn't take it lightly. As one lawyer says, it's the final chance of USCIS to deport somebody. It becomes almost impossible after naturalization.