Cedar Point can get really crowded, not always but usually Memorial Day weekend it will be this way. Like you I’ve been going to Kings Island For a while. I’ve also done my fair share of waiting for rides at KI. I waited a causal 3 1/2 for my ride on Mystic during pass holder preview night, I’ve also done 2 hour Beast Waits as well 1 1/2 Diamondback waits hour long Banshee waits and whatnot, but I’ve also been to CP 6 times now. I usually go for a Friday and than Saturday trip and we Always get Fast Lane Plus on at least one of the days, and that’s during regular season. With Kings Island you will see a couple of Rides get to 1 - 1 1/2 waits of busy days but with Cedar Point you will see every major coaster get at least an hour long wait. Other rides like Steel Vengeance and Maverick will exceed 2 hour waits on a regular basis, especially during times like Memorial Day weekend. You can also expect TTD to be down for any reason at any given time, it’s simply the nature of the ride due to its extreme thec and height. Like what @flightoffear1996 said, go for your major attractions first. Somtimes lines will die down for one particular ride, if you see this hop in line. It really is up to chance with how many people will be kept away by the weather. As for my Tips to navigating a Cedar Point, here you go
1. Fast Lane Plus (it’s worth it)
2. Get a park map, the park is very disorienting the first time you visit. This will help you see the most efficient routes for getting Were you want to go.
3. If there is weather that suddenly stops, move at a very quick pace towards a ride and get in line, the line will be much shorter.
So that’s really all I have, I’d you've got more questions I’ll try and be helpful to answer them.