Trillium fort point clone dry hopping question

im planning to brew this recipe
Tomorrow And have a few questions regarding the hop schedule:
A vision blurred
5.5 gallons
75% efficiency
1.064 OG
1.015 FG
IBU = 68.64 (tinseth)
SRM = 4.71
ABV=6.5%

10.0# 2-Row
1.5 # white wheat
12oz dextrine
4 oz caramel 20L
4 oz Acidulated malt

0.25oz Columbus @ 60'
0.75 Columbus @ 10'
2oz Columbus hop stand @ 180° for 30'
4oz Citra dry hop
1oz Columbus dry hop
Dry hop as krausen begins falling (day 4-5).
Yeast-so4 at 68F
Mash 150f 60 mins, target 5.40 room temp mash pH
Water target 150ppm Cl and 100ppm sulfate

I've never done a fermentation/biotransformation dry hop before. Will it be effective if I use a hop bag or stainless hop cylinder (like I usually do in the primary or keg)? Do I leave the biotransformation hops in until kegging ?

I also enjoy keg hopping. If I were
To DDH in the keg how much citra and Columbus should I use? Should I just split the fermentation and keg dry hops evenly between each (i.e. 2 oz citra and 0.5oz per addition)?

Any other thoughts? Thanks!