This is personal preference. I prefer walking over to the garage and picking out my rental car, throwing luggage in the trunk and driving to my resort. You have to WAIT for DME and other passengers before you can depart. Picking up a rental car as opposed to waiting for DME is probably about the same amount of time. Difference is, I am only sharing my ride with my family members. But people do what works for them and using a bus for transportation never really appealed to me.
Guess what.... Instacart is available for timeshare resorts also but I prefer
Walmart. Also, a timeshare provides the luxury of having a full-size fridge and icemaker. In many of my posts I do mention how putting the kids to bed in their own bedroom and enjoying an "adult drink" on the balcony is one of the highlights of vacation. Having a blender in the room with an automatic ice maker in the freezer makes it possible. Also, a jacuzzi tub in the master bedroom is a plus. Realistically, the theme parks is the vacation with the kids. Staying at a timeshare resort allows for adults to enjoy vacation too.
I would suggest you run the numbers and make a comparison for the cost of staying on-site vs off-site. There is actually a forum thread where the argument continues. Sometimes you pay a little extra for what is convenient for you so that could go for on-site or off-site arguments. Timeshare resorts have FREE parking. But as far as the cost of the car, gas and insurance, IMO, the convenience of eating meals off-site, gift/souvenir shopping off-site, the attractions in the area besides the Theme parks, offsets the price of the rental car in those savings alone. If you have small kids you will need car seats. But safety is safety. And you can bring your own or rent from rental car company. Its no different than having an extra suitcase. Also the airport does have those carts to rent for $5 to put your luggage and car seats on to take to rental car or bus. Sometimes you find staff members pushing one around who is willing to do the work for you. Just tip them. Besides, staying at a timeshare gives you the convenience of a washer/dryer so you don't have to pack so much other stuff anyway.
If the OP is staying at Disney, they can still
rent a stroller daily while they are in the park. So that isn't an issue. Staying a timeshare, they can have one delivered for use. There are plenty of stroller companies and
scooter companies that rent and deliver. The prices are comparable to Disney since Disney prices are higher than anybody it seems.
I stayed on-site once at AOA. Not in a family suite just a standard. But regardless, there is no comparison between an AOA room and a timeshare room that has a full living room, dining room, full kitchen, master bedroom, 2nd bedroom, washer/dryer and balcony. In the end it all comes down to personal preference and what works for you. I think its great the OP is at least considering staying off-site a timeshare resort. If a family stays at a basic motel/hotel type place, I can't say they will have an enjoyable off-site experience.