Since you’ll be in it for an extended period of time, you'll want a saddle that is comfortable, for both you and your horse. Don’t forget saddle pads and a saddle blanket for extra padding. A breast collar or cinch will also help hold the saddle in place.
When riding, you should always be prepared for emergencies, and not only if you’re in a remote area. Leave room in your saddlebags for water, food, and first aid–for you and the horse. Dress appropriately for the ride–wear boots, gloves, and breeches (for English riding) or jeans (for Western).