I'm about to do the same but I never let my LO nurse for a couple of minutes. In that case he's not hungry. I also do the eat play sleep loosely but never out of order (unless growth spurt is problem). She doesn't eat till she's napped. She will act hungry if tired but I found if I feed her while she's tired she just wants something to suck on to sleep. So after play time when she's cranky I know its music and some cuddling to get her to sleep (sometimes this is longer than other times...). She's not a great napper and we're just over three months in age. I'm not sure how old yours is and he might want something other than food (as I found in my case).
I'm going to attempt to pump while student teaching at high school and breastfeed at home. I've been told to get try giving my LO bottles when I'm gone (pumped or not) and BF when I'll be home.
Also get your LO use to your husband and your parents if he's always with you. Do a couple of trial days. Give them some pumped milk and pump around the times he usu eats and you'll get to see how much he eats from a bottle. Mine usu eats somewhere around 7, 10,1,4,7,12,4,7,10. About eight feedings. I'm hoping to pump 2-3 times. Chart him for a couple of days-see if you find a pattern and you can see where his little 'mini-feedings' need to be cut. You might find the cycle is 2.5 hours or 4 hours(loosely but still there).
How old is your LO? That might help out with your answers b/c feedings differ with age and a little from baby to baby.