We need to travel to the airport on Saturday, 2nd of June. This is a strike day therefore we are not sure what is the best mode of transport to get to CDG. The closest metro to us is Voltaire. Any suggestions will be appreciated. Thanks in advance.
I just came back from Paris on Monday, a strike day. On a strike day the RER B is affected, not the metro, so I took a taxi to CDG. There were no particular bottlenecks so I got to CDG in under an hour. The heavy traffic was inbound. On Saturday, I don't think traffic will be much of a problem. Some RER B's will be running from Gare du Nord. On Saturday the RER B crowds shouldn't be so thick. However, as I never take the RER unless disaster strikes, I'm not an authority on it. You could take your chances with the RER B or be secure with a taxi.
We did what 75020 did earlier this month on a strike date. The taxi fare is set 50/55€ depending on which side of the Seine you are on. The ride usually takes less than an hour and the price is fixed. We had our hotel call a taxi for an additional few of euros more since we weren't super close to a taxi stand. I'd do this again and not worry about the RER B.
We also went to CDG on a strike date -- took bus 38 from St Michael to Gare du Nord, then RER-B to the airport. (Mid-day, during the week) Since we were spending the night at CDG Ibis AT the airport for a 7 a.m. (!) flight we had a flexible schedule for getting to CDG. But we routinely take RER to/from CDG, saving the taxi option for "if disaster strikes."