I think SD's for autism are wonderful and can do so many tasks to benefit someone who has that condition. In the situation with the OP, it could be very stressful for both her son and the SD to be apart so it's a good idea, IMO, that they are bringing the dog with them on the trip. Having a SD in the parks makes things a bit tougher but is obviously much better without having your teammate with you. For some more suggestions that you probably already have thought of: I always carry a "lunch kit" for Skye with her water bowl, some treats, her lunch ( she eats in the afternoon), meds for possible diarrhea ( she's had that once) and allergies ( she got stung once by an ant ), and in the summer she wears a cooling wrap which was made by a Dis'er in extra long and wide Disney fabrics to match mine. I have a special wax for her paws to protect from the hot pavement but we try to avoid dark pavement and standing in one place too long. We often go into "show" type attractions where she immediately knows she'd better take a nap and to cool off if it's an inside attraction and we rest during the hotter part of the day in our resort. We stop frequently for water and if it's really hot she gets water splashed on her belly. There's a real danger to a dog for overheating. I bring a stuffed toy with her and her blanket so she knows where her "spot" is to sleep on the floor next to me. We've only once had a problem in a resort but I think it was the mousekeeper who saw her bag of dog food and reported it to the front desk. I had a VM telling me I must remove my dog or leave, then another VM apologizing as they read that I had noted on my ressie that I was t/w a SD. Really the biggest challenge is people wanting to pet her. I get so tired from saying no but if I give in then I feel she's been touched by way too many strangers and I don't want her to be distracted or feeling put-upon. ---Kathy