For me it was one summer. The first trip of the summer was 5 nights. The 2nd & 4th nights I slept in the hammock to see what it was like.
The next trip was another 5 night's and I used the hammock 4 of them.
The last trip was 6 nights and I took the tent just in case. I it the 1st night because of deer flies, the 2nd & 6th because there were no trees. Now I have a Lawson Blue Ridge, which goes down as a bicy/tent and has a bug net. No more te.ts for me.