Ex/Non-Mormon in Provo/Orem/UVU?

Well, first off, I applaud you for your conversion to agnosticism, I myself am an empirical agnostic. Secondly, I don't know the specific place you're going to, but I do know a little about the general region, and I would guess that you're safe. If you are to go about insulting Mormons or anything like that, you would obviously have to deal with serious backlash, but as long as you're amicable, I don't foresee any troubles arising with the people there. I know a Mormon family from the region, and they are very friendly to people of different faiths. I wouldn't expect them to, say, be holding their breaths to see you in heaven, but you are fairly safe from discrimination. And also, if you are at all interested, I'll post a link to my insanely unpopular blog about agnosticism in the sources part, just in case you care to read it. Anyway, though, good luck! Travel safely!