actuarian

Regardless of where you get your drinks, they will not show up in your folio (unless they cost more than $13) until you have exhausted the daily drink vouchers (4 for diamond members and 5 for d+ members). However, that does not mean that the vouchers are not being used in the diamond lounge; in my experience they are. On the other hand, if you are a Pinnacle or in a suite, then you can order drinks in the suite lounge and those do not use up your vouchers.

Since your parents are in their 80s, they should feel free to request wheelchair assistance when they arrive at the pier. The wheelchair pushers are usually allowed to bypass the lines and, in any case, any waiting that they do have to experience will be sitting rather than standing.