One more to suggest the rental, but will add a couple things. If 16063 is your home zip and you are not looking at long distance extended travel, you may want to reconsider the other C's.
Being in the NorthEast, Boondocking sites are minimal, most camping is in established facilities. Those locations will usually be laid out for easy access for larger units, yeah the little sprinter will be easy, but in bad weather they can get cramped.
The sprinters are great if you can really minimize and are looking at very frequent travel. The diesels save fuel, but the sizes are somewhat limited. Mostly to 24' models and less.
Most will not have dedicated queen or larger beds, and generally wont have the large cabover bed. For a single or a close couple they can be great economical units but you will be close.
A Small C on a E-350 or 450 such as a BT Cruiser may be a better option. Sizes are a little bigger than the sprinters, most folks with them seem to feel they drive and handle better than the standard C's, and with the slides give good space.
Rent a unit or two, hopefully one as a sprinter, and one as a 25-27' conventional C and get a feel for what may fit for you.