My Daughter has lost 8 teeth so far(she is 7) and we give her a toonie($2) per tooth. However, when she lost two in one day(she was really nervous about losing the second one so I said "the more teeth under the pillow the better the bounty from the fairy" we gave her $5).

She is a light sleeper, so we worried, but kids even the light sleepers sleep through things like quietly reaching under their pillow. If they do start to wake up, just give them a kiss and say you wanted a midnight kiss.

For one tooth we forgot and she woke up at 4:45 in the morning and checked to find her tooth there and we calmed her down and said she must be at the end of the tooth fairys loop tonight, and she would be fine but she had to go back to sleep so the tooth fairy could do it! Then when I was tucking her back in I quickly swapped the tooth for the coin and she didnt even notice until she woke up.

Also always have the coin/money on hand. My wife usually carries the cash and we were camping without my wife and my daughter lost her tooth, thank goodness my parents were there and had cash!