I do not see how it can be a problem
I suppose for such am small site, it wouldn't be a problem. but as more stuff is added, it can eventually become one. I guess I'm thinking of "future-proofing" (which I always do) because there may come a time when you'll want to utilize the site more - and handling that type of thing *now* would be effortless, comparing to the mass 301's you'd have to put in place later on.
Since this page will have so few posts, I dont want to categorize them and I would prefer to not have "uncategorized" in the permalink.
But again, *because* you will be using posts, you *will* be categorized. The default is "Uncategorized." if you want a different word to show up, then rename the category. Then just use the %category%/%postname as the custom permalink. (again, adding %year% or %hour% or %postID% would be better in front of that, and it really doesn't do anything to SEO)
If you add "blog" as the beginning category thing in your settings, then all your posts will show up as "sitename/blog/uncategorized/postname" so to get rid of the "uncategorized" just rename it.