Yeah, I heard if you visit a location and come back later it'll be scaled to whatever level you were before. Hard to give advice considering the various styles of play. I snipe from the shadows.
Yep. Your level in the game goes to scale with everything else so the game won't be easier as you progress, yet much harder. This is a good element that Bethesda brings up in RPGs because it seems as you go far into a generic role-playing game, the more easier it gets. And I should point out, don't farm your skills to level up faster. I've had a habit of doing this in Oblivion and I just fucked myself over. Level up your main skills at a pace that you enjoy. I used to just jump around and sneak to farm up my skills and level quicker but in the end, I got raped because all of my gears was too shit compared to my level.