Travel Time: It may take you a while to get to and from the geocache’s location, assuming you have access to a space craft that can travel at ~ 25000 MPH. The time needed to travel the average distance of 140 million miles from your home location would be about 8.4 months (235.2 days) each way at a maximum speed of 24790 mph (140000000mls/24790mph/24hrs)/365days).
Approaching the Cache Location: Landing on a planet hundreds of millions of miles away from Earth is incredibly challenging. The surface of here has many hazards. There are deep canyons, volcanic mountains and craters of all sizes formed by meteorite impact. Some areas are strewn with boulders; others are shrouded in sand dunes. In addition, you must rapidly decelerate from 13,000 miles per hour in a matter of minutes. That should not be hard for a seasoned geocacher.
Tools to Bring: You will probably need a space suit with breathing capability to last approximately 12 hours after leaving your spacecraft. I would also suggest bringing lots of sandwiches. And most important is one of those ball point pens that writes in outer space to sign the log.