I was not planning on booking the train to Colmar ahead of time but I wanted your feedback to get a comfort level. We plan to buy point/point 2nd class tickets the day we depart for Colmar (for the approx. 3.5 hrs trip).
We could buy them a few days ahead while we are in Paris if that might make a difference in securing a particular fast train and/or a guaranteed seat so we do not end up standing for the entire trip but I rarely find that reserving a seat for just a few hours is a must. We will be traveling on a Friday morning. Please let me know your experiences and or suggestions. Thanks.