I don't know how old your husband is but if his stomach is in knots in anxiety over this trip, if he were my dad I'd tell him not to do it and let his son call one of his buddies, or take a bus or a cab. Since when did being a parent of a grown adult mean you became his personal taxi service?
And emotional support? How old is he, 12? Last I checked, grown adults who have emotional problems that need support should check with their doctor or psychologist or clergyperson.