Bets, Sam & Kim, many thanks for your help!
Bets, I realize that breaking up our Paris visit is not ideal... I've researched all our options & I think this may be the best option for us.
If I break up our Paris visit, we will still spend the same amount of time in Paris & this will allow us to arrive to Amboise in the late morning (departing from Paris) instead of early evening (if traveling from Avignon). Thanks for your insight, I appreciate it ;-)
Sam,
Thanks for your suggestions! I'd seen this option while researching the SNCF site &I should have mentioned this in my original post above.
I truly appreciate the time you took to research this, though, thanks!
Another reason for deciding to split our Paris visit is that I suffer from a bad back, so it's difficult to sit for long periods of time.
So I'd rather take 2 shorter trips, on separate days, than one long trip one day.
Kim, I've been in HUGE stations (recently in Madrid's Atocha station) & it does take me some time to figure out which way is the "right" way to go. Thanks for your input! I may send you a PM with more specific questions regarding Paris... If you don't mind :-)
Thanks again to all of you, who have been so kind to take the time to help me!