Last summer, I went camping with my family for the first time. We bought a second hand tent, similar to the one on the picture below. We had a great time, but after a rainstorm that went on for 24 hours, the tent started leaking at the seams at the top, causing the rain to drip down at the inside and soaking our sleeping bags. More rain was coming for the next day, so we were forced to pack up our wet tent and return back home a few days earlier than planned. Back home, we discovered that the rubbery sealing of the seams had worn out, so we have repaired this, but it might not provide enough protection for heavy rainfall during a next camping trip. So I was thinking to bring a large tarpaulin and use that to cover the tent at the top. Is this a good idea ? Or might this get dangerous if heavy wind gets under the tarp ? And should I tighten the tarp directly over the tent (like this) or keep some distance using cords (like this) ?