Hi, Shocked, I really feel for you.
I don't have an answer bc after my D-Day my WH did not travel for the longest time unless I went with him. He actually lied to his boss and told him there were issues at home that prevented him from traveling a great deal (he was usually gone every other week).
Has your WH given you access to everything, phone, social media, emails, etc? Can he facetime you several times a day?
If he is meeting with colleagues or anyone for that matter of the opposite sex, can he assure you he will never be one-on-one with a member of the opposite sex?
My WH actually found another job about 6 months after D-Day, when he did travel, he completely stopped socializing on the job for the longest time, no drinks, no dinners, ordered room service.
As a matter of fact, my D-Day was two decades ago, and WH STILL does not socialize with any female co-workers. He is polite but doesn't participate in any non job-related banter. Always keeps it completely on a professional level.
Perhaps you and your WH can have a discussion about the boundaries you feel comfortable with. His actions will speak volumes.