You can park on the side of the entrance road at the corner with Rte 175a. Parking is also available across the street at the Ice Arena. But do look to see that you are not in a faculty/staff space or a student resident space. There are plenty of visitor spaces. The parking nearest the cache is restricted to handicapped and others with a special permit. However, you can likely get away with a few minutes parking near the cache if you want to take the chance.
Cache should be available all year round. But, of course, sometimes the snow might get deep for walking to it.
PLEASE put it back so it is out of sight to passersby.