Yes. I planned on arriving in DC around 9:30/10. Maybe leaving at 5:30 would be the better option. I would like us to be all in one room since its my parents and my kids. But if we have to get two rooms I guess we will. Suite hotels are a good idea and I will check out the I 95 exit information. Thank you very much.
10-10:30 should be fine for DC.
We have done that drive a few times from NY. Leave around 5-5:30. We would stop at the 1st exit in MD and have breakfast at Cracker Barrel. By the time we are done rush hour is done for both Baltimore and DC. We take the East loop around DC and have never hit traffic at that time (may have been closer to 11:00). Once you get south of DC however all bets are off. Northern VA can be a problem especially once the express and local lanes merge.