You can absolutely dry your herb in a grow tent. I've used to small circulating fans inside the tent on low, one that brings fresh air in and 1 blowing it out. Total of 4. It's a great darkroom and I can easily monitor the 4x4's temp and humidity. I also have a dehumidifier and air purifier in the room the tent is in, for that extra happiness. From there it moves on to my curing stages and the tent is refitted for the next veg. This process has contributed to some wonderfully cured happiness. Hope this helps and good luck!
When you dried your buds in the grow tent, did you have another plant going in the tent at the same time? I run a scattered 20/4 light schedule so my lights will always be on in my grow box. I was thinking of screwing together 6 pieces of wood (4 sides, 1 bottom and 1 top) and then sealing the box, wrapping the inside of the dry box with reflective insulation, cutting two 4" intake holes (both intakes at the top) and one 4" exhaust hole (on the bottom centered in the middle).
The exhaust hole would have ducting connected to it and that ducting would be then connected to one of the intake holes on my grow box. I am guessing the vortex fan I have in the grow box will pull air from my basement, through the 2 intake holes on sealed dry box...this would then create fresh air circulation over the buds from top to bottom.
Inside the box, I would have a hygrometer probe so i can attach the hygrometer on the outside of the box to view readings without opening the box. I would have 4 lines, 2 on top and 2 in the middle so I can hang two layers, the top layer hovering over the bottom layer. I am determining how big I can make the box tomorrow when I sort through all of my scrap wood.