Oh, that is hard. My husband and I take turns on who gets to decide on the "vacation" or trip. My husband has had the last few so it's my turn now :-)

I think if your husband isn't going with you you could suggest his mother coming to see you all since it is his mother and presumably she wants to see her son too? I would point out the cold weather and the youngness of your 4 year old and difficulties of travelling, care, etc.? I think your points are very good and if he takes them personally and thinks you're "mean" for suggesting them and wanting to look at alternatives, that would be too bad of him I think.