Originally Posted by dirtbagkayaker
I use flip lines. I put one on each side of the raft. You can easily toss one over to the other side and pull yourself up or quickly tie a loop in the line and use it like a stirrup to get on top of your boat. I've also used 3 feet of webbing w/ carbineers on each end that you keep in your pfd pockets. they can be attached to a D ring to get a foot step up to your boat.
I have those as well, and I also carry a flip line made of webbing and a locking carabiner on me at all times. I don't always take the NRS flip lines (easier floats, lightly loaded boats), but I do always carry the one on my person. I do that for two reasons:
1) to have a flip line for my own boat in the event I don't have the NRS flip lines and it's also an extra even if I do for heavy boats.
2) to have a flip line to help someone else that may not have one or that may need an extra one.
While I have seen the strap run under the raft, I don't think I would ever do that myself. Practice getting back on top of the boat without it on those hot desert floats over the summer so you won't need it!