DH and I just did this procedure this past fall (I had my tubes tied 3 weeks prior - yes, we are making super, duper extra sure - it's my life on the line if I get pregnant again)
The Vasectomy is really a very simple procedure. DH had it done on Thurs afternoon. His appt was for 3, and we were home (Dr's office was 40 mins away) by 5:30. I left him home with a bag of frozen peas (in a little pillowcase so he wouldn't have to mess with the towel) and picked up DD. DH hung out on the couch with a blanket over him, his pants pulled down and peas on his nuts. Every hour or so, we'd switch out the bag, or he'd take a break from them. He took his pain meds every 4-6 hours for the first day. They made him nauseous if he had them on an empty stomach. DH stood up to pee and walk upstairs to bed that night.
When I left for work on Friday, I made sure he had plenty of snacks and drinks in arms reach. When I called at lunch to see how he was, he was fine. He said he was just sore, like someone had kicked his family jewels. He switched out his own peas, heated up his own lunch (leftovers) and took a nap.
The rest of the weekend, he continued his lazy recovery. Monday, it was back to normal, although when he got home, he said he wanted the peas again to relieve some soreness from sitting all day rather than laying on the cushy couch.
Nothing bad or traumatic. Your husband's a big boy - I'm sure he won't die if you don't answer his beckon call at the snap of his fingers. He'll be fine!