I'm going to start the Sobo hike at Mt. Katahdin in late June/early July and I was just curious as to the start of the trail, I've read a lot where the hike to the summit is tough and should be done without your full pack so you drop it off at the rangers office and you get a day pack for the hike. How does this work for the thru hike? Do you go roundtrip on the mountain then end up where you started, pick up your pack, and then continue on the AT through a separate way or what? Sorry for the dumb question but I was just a tad bit confused!