I am looking for some better tires. nothing huge, just a little more aggressive.

right now I have rugged terrains. I was thinking of switching either to AT's or MT's....in 33's (is that the stock tire?) should I get bigger ones?

I want to get them before I head out on my road trip to WY, goin for a week to yellowstone.

as far as use. I do mostly highway traveling, but at the end of all the highway driving, I usually end up on nasty backroads, in the summer and winter. SO, if I get MT's will I be sacrificing a lot of milleage? what about road noise? how bout AT's?

 

I have BF Goodrich A/T's same size as stock and i love them. There is no road noise period. Like you i do most of my driving on the paved highway, but every once in a while i get off the beaten path a little. In one instance i was loaded down with five round bales of hay in mud half way or better up my tires and those A/T's seen my right through it all.