Don't be afraid. Just follow the continental ways.
Having worked at poll stations in my home town in Germany for about 30 years, I have no bad experiences about postal voting. As a head of a poll station for more than 15 years I really can't understand how a "Florida style ballot" was possible.
Over here it is impossible due to strong regulations. People travelling or being sick during the ballot have to apply for the documents necessary for postal voting; they have to send in their votes that they reach the urns before the deadline which is 15:00 sharp on voting day. At this time the poll stations for postal votes are sealed, and it's rien ne va plus.
After opening the letters the documents are checked, and if they are correct, the vote in a special sealed enveloppe is thrown into the urn.
The urns are opened after the usual closing like in the other poll stations and the votes are counted.
Any postal vote arriving after the deadline is lost - bad luck for the voter. He or she should have been more diligent and sent the vote in due time, considering the time postal service needs to transport the letter.

Wilfried (having served in a postal voting poll station more than once)