A/C Lines disconnected overnight - Do I really need to Vacuum?

Thanks again everyone! I had never done anything more than add refrigerant before so this was a learning process.

My neighbor came today. I had already changed the o-rings. He ran his electric pump for about 20 minutes and it was right at 30 inches. Then he added nitrogen to 100 psi. We waited about 10 minutes and the gauge didn't move. Then released the nitrogen and ran vacuum for another 20 minutes back to 30 inches. I added the refrigerant and waited some more keeping an eye on the high side pressure. No change. A/C is running cold. Hopefully I'll be running cool for long time!!! (Insert sunglasses emoji) Hey @Joeychgo where is the sunglasses emoji!!