I do not know the season length and regulations of other states, but if I could go on a true trophy hunting trip to 5 places they would be:
1) Texas, turn me loose on the King Ranch!
2) Nebraska/Kansas, seen some pics of other peoples hunts and chances are it wouldn't be in 3 feet of snow like it would be in Canada....it might just be 2 feet.LOL.
3) Candada, huge deer again.
4) Illinois, seems like all the pics I see are huge deer.
5) Old Mexico, crossing the border makes me nervous, but it is such a wild and untamed place that I couldn't resist.
This is my opinion: Texas offers the best chance at a good trophy buck, but you are going to have to pay ($) for it! And too many of the operations are getting unethical (small places high fenced and bringing deer in). The large low-fenced places in south Texas are as good as it gets for opportunities at a good trophy IMO (that is 155+). Mexico falls into the same category.
For the chance at a record book buck (170+). I would say that the midwest (Illinois, Iowa, Kansas, etc) and Candada are the best bet. The deer are much larger in bodies especially and the mass of the antlers tends to be better (though our panhandle bucks are getting some attention now). Also, most of the places are more true "fair chase" as well. I have no experience hunting outside of Texas, I know only what I read and see in videos.
This is my opionion and I think it would be hard to argue with........you could definately be more specific though.