Hellobee Boards

I would go for it! Just stay cool, Sept can be really hot there. I just went (first tri) and there weren't many things I couldn't go on. We went with our 2.5 year old and it worked out great, my preggo pace and her toddler pace were pretty compatible. Have fun!

@Chillybear: I got this support belt and really liked it. http://www.amazon.com/Gabrialla-Elastic-Maternity-Support-Medium/dp/B000ZKE4AM/ref=sr_1_12_a_it?ie=UTF8&qid=1464199112&sr=8-12&keywords=pregnancy+support+belt

We brought in ice cold water bottles (like, half-frozen) and then just refilled them at drinking fountains.

ETA: And, yes, the rides that are not safe for pregnant women are also too big for her, so you're good there. All the rides that D was big enough for (he was just a few months shy of 3) were safe for me to ride. The only one that was marked as not safe that I rode was the safari at Animal Kingdom. We just requested to ride at the front of the truck and it was no problem.

@Chillybear: Go!

They have regular water fountains for water bottle filling or you can ask for a fill up at a restaurant (but you have to wait in line). I tried to really hydrate the day/night before and the morning of. Any kiosk will also give you a cup of ice or ice water! Ideally though, we just threw 6-8 water bottles at the bottom of the stroller. It allowed us to refill when we were able to but also had water on hand if we couldn't find a fountain. We noticed at MK most water fountains seemed to be by the bathrooms. And most bathrooms are kinda tucked away not directly off the main walking path. So its not like you see water fountains every few feet but you can seek them out if needed.

We recently went in April when I was 22 weeks. There was only one point in the day between 2pm and 4pm that I felt like I was getting really hot and water wasn't cooling me down. We went and found some ice cream and that helped We made it in the MK from rope drop (8:40am) until fireworks (10pm) and my phone said we walked about 13 miles. We booked a good sit down lunch (be our guest) and had a good sit down dinner (just counter service but at a table indoors).

We took our 4.5 year old just a few weeks ago (I was 11 weeks and right in the midst of the all day nausea awfulness). We had a blast. I didn't go on many of the rides but I didn't mind at all. I went on the slow ones approved for pregnancy - jungle cruise, small world, adventure of the little mermaid, people mover, haunted mansion, pirates of the Caribbean (WDW doesn't have the big dips like in DL), etc). There was still a lot to do (tiki room, enchanted tales with belle, etc)

It was hot for sure but there were plenty of areas and opportunities to cool off and stay hydrated. And if it's just too hot and you're tired but don't necessarily want to leave the park to go back to the hotel you can always go to the first aid center and they have cots in the back where you can cool off and lay down. They are very kind.

If for some reason you're struggling to keep up and it's hard being on your feet all day in the heat you can also rent one of those electric scooters ($50 per day and you can park hop).