Hi Jim,
Don't know our cercumstances clompletely, but I used to feed my husband at night while he slep with his peg tube. When he was getting ready for bed, I would fill the bag and set the pump (same kind of pump that is used for IV's) and when he woke up in the morning he had already gotten 1 1/2 feedings. He could go out for most of the day. It really was quite convenient and didn't make him so full.