Hello all. Going to WDW in may and trying to decide if I should rent a single or double stroller. My DS is 7 and my DD is 4. Combined they are probably right at the 100 pound limit of the stroller I'm considering. We went this last May and rented a double and it worked great. But now my son is a year older and a little bigger. I'm definitely getting one for my DD but was worried about leaving out my DS. Any and all opinions on this matter will be greatly appreciated. Thank you!