Rentals around State College are generally tough to come by on PSU home weekends. Probably exacerbated this year with them doing so well thus far.
We have a cabin we like in Pleasant Gap that we rent for our Spring fishing trip when Central PA gets the nod as the location. It’s generally pretty easy to book it in the Spring, but it’s always booked solid in the Fall, especially on PSU home weekends.
You’re probably looking at pretty limited options within an hour of State College at this point.
If fishing Penns is your top priority, I’d agree that camping at Poe Paddy or Poe Valley are likely your best options at this point. You can try Seven Mountains CG…Private CG at the top of the mountain on 322. Maybe a 25 minute drive into Poe Paddy. They have cabins of varying levels of accommodations/prices, but they tend to book up on PSU home weekends. Worth a try though.