Go to the Intervet site and you will get the accurate dosage for the Panacur, make sure you know which solution it is you are giving, it is also in accordance with her current weight not her orginal weight so will increase and yes it sounds like a lot but it is needed.
I wouldn't put the whelping box up until a bit nearer unless you've got room they take up a lot of space and 1wk - 10 days is enough time unless she is very insecure
I didn't take temperatures and she just got on with it .... didn't feel the need to do that
You should start to see the little ripple of the babies and then in the last week or so the kicking and bouncing around
Have fun