Using a reflector is easier because you can meter the exposure with your camera. It is just more pain in the ass because you will need an assistant. If not used correctly, you can blind your subject and make them squint.
I personally rather use a flash. I do not use an assistant. It is all me. Many people hate dappled sun, but I love it. Just put the sun behind the subject. It will give you that not very intense rim light. Here is the step I take...
1. Find where the sun is.. I almost always put the sun somewhat behind the subject.
2. Find interesting background that will complement #1
3. Composition
Most people worry about #3 first.
Here is a sample of dappled sun from the back + flash + decent background. You notice the sun gives that subtle rim light on the hair and the body.
Now this is what it looks like if you use full sun (not filtered/dappled by the leaves) + flash BUT you still use a dark background.
This one is full low sun, flash, but the background is not dark. Remember, the more powerfull the sun behind the subject, the more powerful your flash needs to be. You kinda need to put the sun somewhat to the side from behind or you will get flaring.
Or you can wait until the sun is really low and put the sun exactly behind them so no flaring.
I personally like #1 and #2 scenario. That is always what I try to accomplish. I almost never put the sun in front of the subject. Sometimes I put the sun from the side and put flash on the other side but that is very rare. Good luck! It can only get better from here.