LPR, Suz, Inge, Glory, Smittie, Clara, thanks for your advice and well wishes.
Emily, I'm glad your husband's procedure went well. I had a colonoscopy last month and had the same directions: "sign no contracts."
My husband's procedure went well. They are keeping him overnight. The doctor said nearly everyone for this procedure stays overnight. When I left this evening he was eating dinner and looked pretty good. Hopefully he'll be released tomorrow morning.
As to the advice: it was excellent! Thanks, everyone. I felt pretty good in my grey turtleneck sweater, jeans and boots. I did use the blanket scarf, as it was chilly. I took a couple small knitting projects to occupy myself, and earphones to listen to music on my phone, to blot out obnoxious tv in the waiting room. Just now I put my charger in my tote bag.