Buckmaster highly recommends that people with pets call ahead to a hotel. Don't just don't show up with your pet. Rules about how hotels deal with pets vary from hotel to hotel. Some hotels don't allow them, others allow them only on certain floors or rooms. And then there are the hotels that welcome pets with presents, litter boxes, as well as services such as dog walking, dog sitting and room service.
Airlines also vary in their treatment of pets.
It can be very hot, it can be very cold, and there can be a lack of ventilation. Buckmaster suggests that people speak to their veterinarian to find out if their pet is suitable for travel, and take into consideration their pet's age, health and temperament. I'd also speak to the place you're planning to be, the hotel, to find out exactly what the situation is. Find out from the airline what's required. Some airlines require that you have water in your dog's cargo case.