42.24 miles - The Black Forest Trail. It was one of my favorites for many years when I lived in Western NY. Hike it in the next 2 weeks and you willl be walking in a sea of Pink and White Mountain Laurel blossoms. The trail has may ups and downs and has some rugged sections that are an absolute blast. Usually start and finish at the village of Slate Run in PA (more secure parking) or in the big lot off Rte 44 South of the village of Black Forest.
82 miles - Susquehannock Trail System. Though not as rugged as the BFT and with more gradual grades, it is an awesome trail to head out on. There are many loop & connector trails here so you could easily make a smaller loop trip. Again - You'll be in a Sea of Mountain Laurel. there are many trailheads along this loop. You can start at the Northern District Rangers office (good parking) and have cold soft drinks awaiting you at Ole Bull State Park and even do a mail drop when you backpack through the village of Cross Forks at the southern end.
32 Miles - The West Rim Trail From Cedar Run to Ansonia. You can get a shuttle at Pine Creek Outfitters (Chuck Dillon 570-724-3003) in Ansonia. Many nice vistas - Especially the northern half. You will absolutely marvel at the Mountain Laurel blossoms here. There aren't as many ups and downs as the first 2 trails. but it can be challenging. Don't forget the ice cream at Ansonia Gulf, at the Northern Terminus.
The only time the bugs might be annoying is at stream and creek crossings at lower els. Otherwise, I love hiking in PA - no Mud, No Bugs and no Crowds
BTW, I've thruhiked these trails a few times as well as leading many ADK backpacktrips on them - Feel free to ping me with a PM and I'd be glad to answer any questions and give you some tips on great camping areas specific to these trails.
Good Luck
Rick