Random travel question...

We were planning a Disneyland trip for August, haven't booked yet.  I went to WDW twice during my last pregnancy, once at 14 weeks and again at 18 weeks.  It was fine, great food.  If we go in August, I'll be about 28 weeks....how big will I be?  How uncomfortable?  My son is 2 so we won't be riding the thrill rides anyway.  Thoughts?