so you've walked SOBO?Here is your SOBO challenge:
You start in a very remote area so make sure you have experience. Gear changes or shipping equipment home won’t happen in the first few days.
Your first two days are in BSP. You will likely then camp at Abol Bridge before entering the 100 Mile Wilderness. You then have 8 to 10 days in the 100 Mile since you won’t be in trail shape yet. Yes, I know you think you are training hard. Just trust me on this one. Few of the SOBOs I met on my thru appreciated the difficulty of being on trail 10 to 12 days before the first shower and resupply. Most had a very expensive food drop left for them in the 100 Mile. Most had too much weight. Most failed before exiting the 100 Mile and had a very expensive shuttle out of there.
NOBO and flip flop means you will be in trail shape and that area wont be nearly as hard. You will go thru in 5 days and no food drop will be required. You will be accustomed to the significant discomforts or wet feet, bugs, no shower, heat, cold, etc.
I met several people on both the north half and south half of the 100 Mile Wilderness that were turning around. Both section hikers and SOBOs. Never saw such a thing on the other 2,000 miles of the AT!
After you leave the Whites you will hike through a lot of overgrown trail. Summer will be on strong. Many areas have poor trail maintenance. It’s much different than early spring when the trail isn’t as overgrown yet. I did a flip flop and experienced that overgrowth from HF was to Springer.
A SOBO is certainly doable. Just make sure you know what you are getting into.