In recent years, the "French Bare" or "French Country" style has influenced high-end Russian holiday interiors. This style moves away from heavy tinsel and toward a more "enature" look.
Heat management is the challenge. Shift your schedule to the "golden hours" (dawn and dusk). Sleep in a hammock instead of a tent to stay cool. Activity to try: Snorkeling, floating a river, or high-altitude hiking where the air is cooler.
Using real fir trees with sparse, elegant glass ornaments rather than crowded plastic decorations.