On Lake Erie, the weather tends to blow in and out pretty quick, so even if it starts to rain you can duck into one of the arcades or something to wait it out, and most of the lines have covered areas, if I remember right... you should be fine.
Anyways...I grew up relatively close to Cedar Point (Wood County represent?), so we'd try to have family gatherings there as often as we could, even after I moved to Indiana when I was 8.
All of the recommendations in this thread have been great, but three notes;
- It is a long standing tradition to try and pick which car will finish first on the Gemini, Red or Blue. Being on the winning car entitles one to bragging rights for the rest of the day.
- The Blue Streak is pretty meh, until you realize it's almost half a century old, the oldest roller coaster in the park. It has just enough dips and drops to be worth riding anyways, but fucking ride it to pay your respects to a great park.
- What's with the Iron Dragon hate? It's not the most thrilling ride, but the way it swings beneath the track always struck me as a very smooth, fluid ride. I can't recall seeing many other hanging-car coasters, but I haven't been to a coaster park in years.
Still, I like it because it just as a kind of unique feeling compared to most other coasters.
Oh, and a fourth point;
- Watch your hands on the Mean Streak. Not only is it a seriously rickety cunt of a coaster, but some of the support beams are low enough that taller folk can get a nasty slap on the wrists. Reports of broken wrists trickle back to me from friends every now and then.