WoG tends to get frustrating if you more often play in Multiplayer (which I guess it’s your case as you mention playing with your friends). As unfortunately I have no friends interested in Heroes even a little bit (and due to my schedule, I’ll probably never be able to carry an online game to the end), I’m forced to play Single Player only. And for single players WoG is vital I’d say to keep the game interesting.
But I see what you mean. And VCMI will be playable in a format pretty close to the vanilla HOMM3. But currently it does require WoG to be installed in your Heroes folder. If you don’t want to mess up your main Heroes folder (because of the hardcoded WoG elements), I suggest you just copy it to another location, install WoG over it, and then VCMI.
I don’t know if on the long term there are plans to have a (larger) VCMI kit, which would come with all the files necessary, so that you don’t need the WoG installation. I guess Tow/TowDragon can confirm that.