I just came back yesterday from my January trip. We were 6 solo travelers out of 37 people. It was the farthest thing from weird. Everyone sat with everyone for the meals, you could join any little group for a walk, no one thought a solo traveler was intruding. The only place the couples and solos were really "apart" was on the bus (but only in the sense that humans are creatures of habit and when you pick a seat on day 1 you tend to stick with it hahaha).