You need to go to www.nycmarathon.org and print out some of the tip sheets. I've done this for my wife. The "Spectator Guide" is 6 pages. The "Spectator Checklist" which is also Tip#20 is 2 pages.
There are also several tip sheets that your husband will want to print out. These include Tip#27, "Baggage Procedures and You;" "Getting to the Start;" Tip#22, "What to Expect at the Start;" and "Race Number & ChampionChip Pick-Up, Packet Pick-Up, Marathon Expo, Gift Shop."