I live in North Conway (heart of the White Mountains) if you need any local info feel free to bounce it off of me. STR market here is very saturated but I'd hardly say oversaturated, there are so many people that come here summer (hiking and other attractions) , winter (skiing) , and fall (leaf peeping) and it's only growing. If you need market info you could give pinkham or badger real estate a call, they both have short term property rental management services and I'm sure they'd be happy to give you some better insight into the short term rental market. My experience with airdna is it's a decent starting point but I would definitely not rely on it for running numbers or projecting earnings, just my opinion. I will say finding a reliable cleaner may be a bit challenging as there are far more rentals than cleaners here, but it can be done.
Look forward to following your journey, I have been interested in getting into STR in the area for a while but the market is extremely competitive, everyone wants a piece of it.
Also of note, there is some local resistance to STR that you should be aware of. Conway village and the kearsage zone of north conway have had some rumblings of ordinance though nothing in place yet.