Off to a good start Arkansas!
Never got the chance myself to grow the Purple Mtn. out but I did run several of the FMF and they turned out pretty darn amazing... Very sweet nose and colorful buds. The potency was pretty great, had a good get up and go kick to it. The good thing imo about the full moon fever is unlike most of Gu's strains, it leans more towards the durban, than it does towards the purple stardawg stud. I can confirm this because I have grown out several of the full moon fevers and you'll more likely always find a durban learner. That stardawg stud he uses is VERY dominant in all of his crosses, which isn't necessarily a bad thing, but most of the time people are searching for the characteristics that lean more towards the momma that was bred with the stud.
I am running several from GPS atm as well that I have never ran before, so far they are kicking ass in veg. Lots of them already have very visual trichs on the leaves, I hope we both find us a few keepers bud.
Also, if you plan on growing outdoors this coming season, make sure you get plenty of cuttings from those Full Moom Fevers, store them in the fridge or something if ya have to till spring rolls around unless you have the room to go head and root em and keep em in veg... They done fantastic for me outdoors last year, very mild resistant, insects didn't seem to care all that much for it either. Rock hard nugs with a sweet licorice, sugary smell and beautiful colors. She finished around mid October for me. Good luck man! Swing by my thread and check out the greenpoint gear I have going atm.