I know this is late...
Hellsbane, Molvik is the BattleGrounds from 35-39. There are many nowadays, including one for lvls 1-4 and 5-9; all the way up pretty much.
The reason you easily took the tower,MidInTheNight, is that Molvik is practice. I have taken BG cks with 2 ppl before (3 in grp) and no resistence except from npcs. It is so that you can at least have an idea of what is expected and done in the real realm war. It is also to get realm abilities that would be only available at approx 45+ without the BGs.
As Hellbane said, big-boy RvR is very much more serious than the battlegrounds. When you take keeps it actually affects eveyone in the realm. People receive more loot and experience points when you hold lands in other realms. It's how Darkness Falls changes hands. There are realm specific relics that can be stolen and taken back to your home realm to weaken other realms and strengthen yours. And of course bragging rights. Not to mention the league of people you will be fighting... you will be killed before you can even see people, or get one attack or spell off. Of course it works both ways too.
For real RvR, you have to sometimes actually invade other realms to attack their keeps and towers and pillage relics. There will be calls for defense in your guild or in large populated ares. You can actually see people answer the call, drop everything and run to the defense of their realms.
I seriously doubt that you will so easily take anything (except dirt naps) in RvR after lv 45.