DH is wanting to go to US and IOA at 9 when they open, leave at around 1 p.m. (staying at WH so 1/2 hour drive back), stay at rental house for the afternoon and return to US/IOA around 4 p.m. Does that make sense given they close at 8/9 p.m.? We found last year at DW that the mid-day heat in FL in June is unbearable and we needed that afternoon timeout, but since they close so early will we still be able to see both parks? Plan on going for 3 days. Also, if we leave and come back is the parking permit still good or do you have to pay again?