We'd like to do a day trip from Paris to Angers in mid-April. InOui direct trains from Paris to Angers are close to being sold out in mid-April weekends. For example, Saturday morning, April 18, there are almost no tickets available. I'm concerned this means Angers, especially the Chateau, will be overly crowded. There are slower trains, but that doesn't really work for a day trip. That weekend is best for us, although Monday might be made to work.
Any insight into why trains would be sold out a month in advance or suggestions on visiting?