If he's not on it already get your husband to talk to his doctor about the basal-bolus insulin regime. You take an ultra long lasting flat action insulin that covers you for 24 hours and then you just top up at each meal with a rapid acting insulin usually in pen form - it almost imitates how a functioning pancreas works. My BMs used to be up and down, usually low in the night but now I very rarely get any lows, just nice steady blood sugars. It took me a while to get used to shooting up in public but the pens are actually very discreet and you can inject through your clothes under the table if necessary.