First, is there such a thing as a security screen door for an RV (5er)? Like the kind you can buy for your home http://www.homedepot.com/h_d1/N-5yc...Id=10051&catalogId=10053&superSkuId=202933690). Besides having pets and worrying about them accidentally popping out the screen sometimes I'd just like the ventilation of a screen door, but with the added security of a deadbolt. The other thing I'd like to know is what people think about these screen porches you can attach to your RV. Looks like a good thing for additional space, keep the bugs out, good for rain or shine. My concern is how heavy they are and ease to put up /take down. Thank you!!