Getting a truck with a little more snort and carrying capacity will make the experience more pleasant for sure, but, now, knowing more about the equation (your husbands capability/ experience), I'd say get him involved, as much as you want to make it a surprise.
Again, depends on where and how far you're towing. Also, a happy medium, a bit lighter and smaller trailer may be a viable option. If you already have a good pickup that you know well and like, you can find many campers that are within its capabilities and you're travel expectations.
Also, thank your husband for his service as well!