I agree w/ par exactly, thats what i do too!

I use leashes when walking my dogs on sidewalks, in towns, cities etc... but if we go for a hike, camping or to the park & there are no aggressive dogs there then they are off leash. They both are gentle & have a VERY good recall!!!!!
When we are hanging out in the yard they are both off leash as long as I am there supervising, If I am inside or something, one is leashed, the other one is rarely leashed. He never leaves my yard. He is old & trips over his tie out, he has arthritis etc. I live in a trailer park away from the road, not even a main road no neighbors on either side of me. Friendly dogs through the whole park.