Go now before she gets any worse and make all the memories you can. She may not remember the next day what you did the previous day, but in your heart, you will know she had a good time. With her using a walker, it will be a little easier for you to keep tabs on her, as she can't wander off in a split second like someone who is physically fit to walk off.
Each person progresses differently and reacts differently to the meds used. So it's an individual thing. When my MIL started wandering off, we moved her in with us. If your wife isn't wandering off yet, that's in your favor for now.
My MIL never had hallucinations. One thing she did was take events from back in her past, and she thought it just happened. Just mixed up in relationship to time - which is easier to deal with than hallucinations. MIL also never got violent.
Different surroundings may confuse her, but you will be with her. Plan a short weekend trip, and see how it goes before you go too far from home. Good luck. Alzheimer's is a terrible disease.