As I've said (probably too many times) before: if you have one "if you don't mind" or "if you make sure you" caveat, you should be ok. If you start having 5 or 6 or more conditions, then it's time to re-think your plans. In my mind, if you have to rationalize the trip by saying something like "It's not too bad if you rope drop then leave by 11 am, then go back to the resort to swim or nap, then go back after 5 but make sure you bring cooling towels and stay hydrated and be sure you know it will probably rain every afternoon so bring extra clothes and shoes and pack a poncho and be aware that pools might close if there is lightning and try to stay in the shade and indoors as much as possible", then I think you're doing way too much work just for "it's not too bad".
IMO, that is true for every season of the year when it comes to WDW. They all have trade-offs like sky high prices, crowds, variable weather, variable park hours, etc.
No matter what time of year, staying hydrated is key. It is just a little more important in summer. In summer/busy weeks, we take a break 2-5ish, then have all night in the parks. Other times of year, it is harder to take an afternoon break because park hours are short. Summer after dark is my favorite time to be in WDW.
We always bring/wear 2 pairs of shoes to WDW, where one is often water-tolerant walking sandals. They are pool shoes. and also great when we're home. We've had vacations nearly ruined by faulty shoes, so lesson learned. Trading off shoes also = no blisters. Since shoes are essential at WDW, we always have back-ups.
I tried the cooling towels last summer. They were okay, but we mostly didn't use them. They are very compact/light, so worth packing, but just as we rarely use plastic ponchos, we also aren't likely to use the cooling towels much. They only cost a few $, so no big deal. IMO, they are a bit like plastic ponchos, chapstick-style sunscreen, and Fuel rod chargers. We rarely use them, but they can be useful.