Harvest soon ?

Plenty of new/white pistils there. I think you've got some time to go. I wait for nearly all (if not all) of the pistils to turn brown and then recede back into the calyx as the calyxes swell up.

Nice looking plant! I think you have a few weeks left, The pistils can dry for a few reasons and is not always a good indicator of when to harvest. Maybe in ideal perfect conditions but they are hard to meet. You 100% have time to wait and can use your LOUPE when it arrives via post. Or if you want to try a DIY method in the meantime you can place a drop of water on your camera lens and it acts like a shotgun micro lens. Only works on small phone cameras and phones that are water resident. Iphone8 and up and no idea about any other models. As for going away, If you have anyone to take care of the plants in your absence do it, set it up so all they do is a small watering, make it stupid simple. If your only away for 4 days it should be ok. If your gone a full week that can be ticker when no ones around. Could try a self watering option using a 2L bottle with a watering tip. and worry about nutrition when you come back if that's how your feeding schedule works. https://www.amazon.ca/vensovo-10pcs-Terracotta-Watering-Spikes/dp/B07Y87YQPF Hope this helps Happy Growing!

Looks to me like you have at least 3 or 4 weeks left to grow. Still very immature at this time, but the buds are looking great! Great job so far! Good luck.

Looks like you need a few weeks to many white hairs to even ck trics