I'm not sure but where you get the bus (college green) there is a tourist office... inside there you can purchase tickets! Pick up is usually 7.45 ish...

That was challenging. It’s a bit challenging to find, since there weren’t many street numbers. I walked around quite a bit looking for it. It’s at 37 College Green. But, it’s on the corner of College Green across from the Trinity College main gates. There’s a bank on one corner and a really cool building that reminded me of Harry Potter on the other. (I’ll try to upload a photo for you.) In that cool building is a tourist office. That’s where you go. I think they can check you in at the office and then you can wait at the bus stop just to the right as you face the office. There is a regular bus-stop sign and a bus-stop sign for Gravediggers, too. Have fun!!

No not a lot. At 2 points you get off the bus. Once to go into spooky cemetery. Walk was about 100 yards each way. Also you go to state grounds and go into lower old relic area. You see all the different foundations dating back to Viking era. Also dungeon while your down there. Very cool. I have half of left foot and walking was not overwhelming. If you can’t do 200 yards then you will have to probably skip it. The lady was outstanding that guided the tour!

your bad!