No it's not wrong to be hopeful there's lots of money being flung at crohns some will stick.crohns is a dumb disease like any other totally random,annoying and a lot of people know very little about it including me until I got landed with it.i know it's early days for you both but just remember the vast majority get along fine with crohns as most people don,t go on forums.
Smoking is bad for crohns so it's game over for that one if your a smoker you could stop as well for moral support,treatment and diet options are so varied it can be very confusing so listen to your doctors ask questions be educated but be wary of dr google he,s a manic depressive.
There are a few things we crohnies have in common,diet wise greasy oily food is bad,fruit and raw veggies be cautious but as varied a diet as your husband can manage fish,chicken,white rice,soup with veggies well cooked or blended some spices are useful turmeric springs to mind its a natural anti-inflammatory.exercise ie a common theme on here it seems to help is when he,s well enough,doesn't,t need to be a pumping iron session.
Stress is a big factor in stirring crohns up so try not to and if you,ve managed to wade your way through this good luck and all the best.