It's best to ask whoever it is that you booked the holiday with

tnxx i guess il do that

It's oh so cold in Alaska

i know im excited

You won't need collect your checked in luggage when you change planes, you'll collect it from the baggage carousel when you arrive at your final destination of Juneau. Sometimes if the journey involves more than 1 connecting flight, your luggage might not even be travelling on the same planes as you.
If you're taking 4 seperate flights to reach your destination, your luggage might be travelling seperately and reach Juneau using only 2 flights(from the departure point direct to the nearest major airport hub(eg, Vancouver), then onwards from Vancouver to Juneau)
It all sounds rather complicated and unnecessary but they do it all the time, it's to do with cargo weights and air fuel costs. I only learnt all this recently from someone who had just returned from a holiday abroad and was busy tracking down their luggage, which had been lost in (outbound)transit. They did get it back eventually, nearly 3 weeks after returning to the UK, they'd had to buy a load of new clothes and stuff to wear/use while on the holiday.

on the way to vegas we had to change in chicago we had to collect our bags and go through customs, then recheck our bags. It took about 3 hours and a lot of standing in very long lines. Made the mistake of going out for a cig, fk me another 2 hour wait in long lines to get back in, by the time id got back in, i needed another cig

Soz i duno.but have fun.

No, not necessarily. Whethe the luggage is transfered automatically or needs to be picked up in one transfer point is either listed on the boarding pass obtained for another transfer or in the airline details. There is no one answer.

say hi to Sarah Palin

Think that'd be because you were transferring from an international inbound flight onto a US domestic flight, rather than directly from an inbound through to an outbound international flight.