Re: Milk amount with Lunch time nursing?
i don't know how it'll adjust for lunch nursing for your little one. you might want to do a trial day in advance to get a sense? your plan to have your mom give bottles on demand, but avoid the hour before you see him, sounds good. a normal bottle size should be 3-4 oz, not 3-6 oz, though. you won't want him getting 6 oz an hour and a half before you get there!
the things i can't live without while traveling are carriers and a swim suit. i love hotel pools with ds. a stroller, if your mom won't/doesn't use the carrier. i've found hotels to be generally pretty baby proof, especially at 4 months.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.