Glutamine is a great supplement, but unless your dieting, you probably get enough from your shakes and whole-food sources. Though if you were still going to take it, I would recommend 15-20 grams a day.
As far as creatine is concerned, the whole idea behind creatine loading is to reach peak creatine muscle saturation in only 4-5 days, as apposed to a couple of weeks. And once you drop down to a maintainance dose of 5 grams daily, that dose is now enough to maintain that peak creatine muscle saturation.
Never the less, which ever route you chose to go, whether load or don't, you'll still end up getting the results.