I remember those times.. My boys are 2 years apart, almost to the day.. By the time my youngest was born, my oldest was off and running, getting in to stuff regularly, and pulling at my skirt for some time to play like he was used to, until baby brother came along to make mommy sit, and sit and sit.. I remember one day, while my little one was laying down on the carpet on a blanket, I jolted outside to collect the laundry off the line, and the oldest locked the wrought iron gate and dropped the keys in the middle of the living room floor.. well he was only two and when I tried coaxing him into bringing mommy the keys, though he perceived it as, "At last! She's playing with me again!" and proceeded to hide the keys in different parts of the house, egging me on to come and "get him" and get the keys..
Long story short, it was a good thing I layed the baby down near that door with a gate. I nursed him through the bars, until my husband came home to let me back in.. In the meantime, however, the oldest had emptied the fridge, mixing yogurt, soy sauce, last night's leftovers, baking soda, and whatever else he could open, into a nice thick concoction on the floor....
Moral of the story is.. There's no "right answer" or Perfect schedule that you can use to make it "fair" between the kids, or to you, or make it copacetic for everyone... The baby I'm sure could care less what time you think he should nap, or eat..... And the older one won't understand WHY it's time to lay down with baby instead of playing with them....
Just gotta take it day by day.. :)