Off the top of my head, the Mets blew a few against the Royals in the WS last year... And in the 2011 WS game 6 the Rangers blew 2 saves in the same game against the Cardinals.
It's baseball dude, that's the nature of the game. There will probably be some games where we tee off for 5 runs in the 1st inning off a guy like Price or Kluber. It happens.
I'm a firm believer that Cecil getting hurt in ALDS really f***ed our chances against KC. Would have been really nice to have Cecil to face guys like Moose, Hosmer, and Gordon. Also Loup missed a lot of key games in the ALCS
My dad has done it before, although they did give him a bit of trouble. Just a bit of arguing for 20-30 seconds and they let him bring it inside. Depends on who is checking the bags I think. You should be fine though