Some sound advise already.
I have taken a couple dozen moose in my span, guided for them and have buddies who do the same.
There are a few "tricks" you might wish to know.
First: Get her to learn to be deadly accurate with the 308. Shoot for the heart and lungs and it will do the job at reasonable distances.
Second: Start watching as many moose calling videos as you can on YouTube and mimicking them. The cow call is the most important IMO, so focus hard on that. For the bull grunt, learn how to do an immature moose bull call (higher pitched, softer and shorter than a dominant bull call). Of course practice with the mature bull call, but spend a LOT more time on the cow and immature bull sounds.
Grab some Buck Expert Mare In Heat (synthetic) scent lure. As in the larger size of bottle with a decent sized lid. Available at Cabela's and like stores or online. Caveat: I am in no way associated with the company mentioned. However between myself and quite a few other professionals we have proven this product to be the best available by a large magnitude.
Grab some medium sized scent free tampons. These absorb a good amount of the scent lure noted above, and come with a convenient string to hang from tree (bring extra string).
Go in early and again within a week of your draw dates. Go in silent mode. Determine the best area to set up on as for sign and potential shooting lanes. Clear extra shooting lanes at this time. Determine at least two such sites. Set up natural ground blinds or tree stands. Set the latter up based on wind patterns. You want to be off to one side and somewhat downwind of the scent distribution.
24 - 48 hours before your hunt, sneak in and set out two of the tampons soaked in the scent lure. One as high up in a tree as you can get (extra string and a weight helps). One around 10 feet or so below that and off to one side. Cow call just before you leave around 6 times.
Day of your hunt:
Sneak in under the cover of darkness and allow things to settle for around 1/2 an hour.
Begin with a medium loud cow calling sequence - 4-6 calls, and wait.
Rinse and repeat around every 20 minutes.
If no response after the first sequence, increase the volume (but not the duration).
If you get a bull grunting in response, use both the cow call and the immature bull call lightly to get him to commit.
That trick works well when they hang up just out of sight.
Many times a bull will come in silent, and simply suddenly appear. Be prepared for that.
Moose are big. Have a wrecking crew available, or be prepared to deal with it yourself. ATV's and side by sides are useful for this.
I employed this method last year, and shot this bull at 27 feet.
The method as described has been responsible for dozens of success stories over the past couple of decades.
Simply put - it works.
The scent lure was so effective last year I had another bull come in point blank while I was talking on the phone standing next to the gutted moose and gut pile. Two days later another bull tried to gain access to my buddy's carport outside of Prince George where he had stored the scent bottle - double ziplocked.
Do your homework on the best places to set up, shooting, and calling.
If you follow what I and the others above have noted, you will likely enjoy some fine success.
Cheers,
Nog