Q1: How large is the voting pool?
Q2: Could it be done the same way as when I get a proxy vote in the mail?
Everyone gets, via US post office, a ballot with the choices.
There's a postage paid envelope included for the ballot to be returned to a mailbox, not a person.
It's clearly stated "Vote For Not More Than One Person" per position.
Ballot will be invalidated if photocopied or otherwise altered.
One ballot per envelope, or every ballot in envelope is voided.
A custom made stamp (a la letterboxing stamp) will be on every ballot to avoid reproduction.

good point. Though if all the sudden there were 25 votes it would look suspicious....there are usually only a handful of voters anyway. Its just gotta be a way that there is no possible tampering. (enough of that in the real world)

If not survey monkey, I think I may insist on in person voting....come to a meeting, fill out a form and put it in a hat and then be counted! Boom done! Old school sometimes is the better way to go.