I didn't glue mine, and that came in handy today when I snagged a power wire and had to pull a few sections. I used a #4 screw from home depot, the shortest they make. There is one slightly longer with a smooth upper shaft that is usually recommended for Fastrack, this is the next step down. Don't overtighten, the plastic is soft and will distort, and then you'll have a hard time with the manhole screw covers. By the way, a pushpin really helps to snag and pop the covers.
To hook up, I used the same connector as for Fastrack. I had to order a bag of them from an online wholesaler but they were cheap and they are really the only and best way to go. You have two options - either carve a notch from the sidewall of the roadbed and attach from the side, or use a pair of pliers and bend the tabs 90' down. This hides the wires completely but your hole has to be placed just right.
I have three loops, the longest is probably a little over 4 feet wide, so maybe a ten foot linear run? Each only has one drop and I have no noticeable power loss, and that's even with an Atlas trolley on one loop.