I would keep the morning nap at about an hour, maybe and hour and fifteen. It's actually unlikely that it's the reflux that's bothering her for naps if she's sleeping so well at night. Is she on medication? When you say reflux, is this spitting up, or is she in pain?
If pain's not an issue, I personally would do all sleeps in her crib. That's just me and that's based on Tracy's theory of 'start as you mean to go on.' It's probably not *crucial*, but I do believe in being consistent. This consistency, I must warn you, often means a baby who does not sleep well when out and about because they've learned to associate sleep with their bed. I'll leave the stroller vs. crib up to you... personal decision, really if it's not interfereing, which it seems not to be.
As for the bottles, I think you'll just have to play with things with her being on a four hour routine. It may mean she eats at times a bit off-tune from the classic, E-A-S-Y ... the key being don't feed her just before bed as she'll become reliant upon the bottle to fall asleep. Even if you feed her a n hour after being awake, another twenty or thirty minutes before going down is fine. You just have to find your way and as soon as you do, she'll flip it all upside down on you anyhow. Heheheee..
It's very common for babies to eat more frequently in the evenings. They're storing up calories for the nighttime. Encourage her to do so. Many mums clusterfeed in the evenings. A breastfeeding mum may feed every two hours from four pm until bedtime. In your situation, every three hours, or even 2.5 if she'll take it is dandy.
