I'm going to uninvite my wife on a trip as I'd rather just make it a boys trip and just have it be my boys and me.
How do you think she will feel when you uninvite her?
Well she was complaining about needing to get more work done so I think that would be a good thing for her to do.
It's nice that you considered her reaction, but flat out uninviting her would make her feel left out and the trip is something you already planned for. You could suggest that she skip the trip to get the work she needs to get done completed, but if she wants to go on the trip you should just let it be and have a great time as a family.
Nah, I don't really like this trip idea with all of us, even though I invited her.
You need to be more mindful of your wife's feeling and how hurt she will feel as uninviting her is a rude thing to do. You can plan a boys trip in the future and surely your wife will be supportive of that.