I called and sounds like each Resort is going to have some poolside things going on for 4th of July. They will have fireworks, but not a major display according to concierge.
We checked into RPR 3 days after the 4th last year. No noticeable difference in crowd at resort but the parks were slammed, even with FOTL perk it was very slow going. Seemed worse than what we experienced at WDW the week prior. My thoughts the culprits were the normal bottlenecks, bridge area to HP @ Islands, etc.
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