My wife shoots a 58" recurve and a 54" Lost Creek NAT, she is very accurate with both. There are several different size blinds for sale, close out prices, at the local Bomgaars. I tried to talk her into the cheaper mid-sized one. "You aren't sticking me in that dog house." I believe the larger one would work for me and my 66" longbows very nicely. However, you mentioned having kids in there with you, If you can be accurate with a shorter bow, that may be better. My guess, even a larger 6by6 would require bodies to shuffle if you needed to cant the longbow, alone in the bigger blind no problem. Personally, I prefer natural blinds that are provided by the invasive cedars that grow where we hunt. I like watching hawks and eagles fly by.