"Some are, yes. But, you also have communities like Godric's Hollow and Ottery St Catchpole, where there's more intermingling between the two." Looking at history, Remus didn't think complete isolationism often worked out well in the long run. Humanity was social by nature as a whole.
Chuckling softly, he shrugged. "Old buildings have charm and magic of their own, too." He'd always felt it at Hogwarts. Even without Harry, if he'd gotten an offer to teach, he could see his future self taking it just to get back to the school and experience that magic again. He raised an eyebrow as Draco went on. "You don't have to talk to everyone, you know. But, you talk to me. You have a shared history with Theo and Pansy. You have volunteered to join the teams, to help when needed on multiple worlds, and shared those experiences. You're considered part of the group by others. You don't have to be chatty and best friends with any of them. But, you are someone they think of and take into consideration. You are a part of the core group, a more self-contained part, but a part of it all the same."
His grinned in response to the face Draco made. "The runes can be used for more than divination. They can be used to anchor spells, too. You can use them two ways, the most common is to inscribe the runes where you want the spell to be cast. But, a runic sigil can be used as a mental focus, too, similar to thinking of a happy memory when casting a patronus charm. For what you want to do, you could try combining Hagalaz and Kenaz so that Kenaz sits inside Hagalaz." As he spoke, he used his finger to trace the ᚺ symbol in faint gold light in the air. Then he traced the ᚲ symbol so that it sat between the upright stroked of Hagalaz, bisecting by the cross-stroke. "Symbolically, you're wrapping Hail around Fire, leaving the warmth in the center, surrounded by a layer of cold. If it were going to be inscribed on something, you'd probably want to do it in the reverse of what I just did, Kenaz first, then Hagalaz over it. But, if you use the sigil as a mental trigger for a wordless spell, you would just need to picture this completed form to focus your intent."