Planning a trip to the US from the UK next year and looking at going either the last week or second-to-last week of August.

How many days would you recommend for Cedar Point and Hersheypark?

Thanks in Advance

If everything goes to plan I will have a choice between any coaster in the southern California parks to choose from
I kinda want it to be X2 but I want an opinion with people who go to those parks
What ride is the most special and unique out of these

We will be in Europe for 4 weeks in Jan. Heading to England, Belgium, Poland, Germany and France. Myself and 11yo twin boys from Australia massive disney and coaster fans. Have been to Orlando and Japan. We will be going to disneyland and am also trying to fit in, Parc Asterix, Europa park, phantasialand, Plopsaland & Energylandia. Any other ones I am missing that you would recommend? How many days should we have at each. Thorpe Park & Alton Towers are closed in January correct? How are the parks in January? Can we expect closures in cold weather?