Both hayscented fern (Dennstaedtia punctilobula) and sensitive fern (Onoclea sensibilis) happily colonize my extensive Sarracenia plantings, which are in full sun. Unfortunately, the rhizomes become intertwined with those of the pitcher plants and are a huge nuisance all summer, requiring constant intervention to keep them from crowding out the pitchers. Lots of ferns will take full sun as long as moisture is consistent, including many Dryopteris sp. and Ostrich fern. I'd recommend using separate containers which could be placed alongside those containing the Sarr.'s and concealed using mulch or pinestraw. Even then, the ferns will be likely to spread into the pitcher bogs via spores, so you'll have to keep an eye out to maintain the balance of "nature".