Marty, sounds like a good trip!
I think the answer to your questions are yes, and yes (most of the time)
I prefer to use at least 12lb test for bones, unless I am fishing somewhere and the bones are extremely skittish from angling pressure (sand flats at savannah sound) I often use 16-20lb test. In los roques we used tippet this heavy, and the bones did not mind.
Just jumping from 10 to 12 will give you a quite a bit more leeway if your "touch" is a little heavy on that first run. Going up to 16 and you should not break any off, unless they are monsters!
I've caught many on 10, but the margin for error gets a lot lower.
Cattaraugus Creek Outfitters
God does not deduct from man's alloted time the hours spent fishing.