I'm trying to crochet a scarf and need some advice

[2banon]

Question: If I'm doing a row of double crochet stitches, do I turn with a chain two, or a chain 3? There are a number of great youtube vids for tutorials but I've found very few dealing with this question, and the two that I did find, did not agree on this question. One said chain 2 and the other said chain 3..

Crochet is wonderful because it's so forgiving in terms of perfection issues, which I typically struggle with all the time. I have crocheted scarves way in the distant past and took up making myself a scarf last winter which I'm fairly satisfied with in terms of the choice of wool, thickness, colors, stitch and overall looks as well as comfort.

However it is flawed with edgings waving in and out a bit, so I figured I'd camoflag this problem by doing a single crochet border all the way around. I want to make scarves for friends and family for xmas presents and I'd like to have a nicer finish than the one I made for myself last year.

Anyone?