You'll see jack squat from the tramline, depends on what's on the Edinburgh end of the back road!
Haymarket tends to empty out from half 3 onwards, the bulk around 4pm from memory. You'll see a lot during the day from the bridge over the platforms at Haymarket anyway. As Kite says, the InterCity stuff won't generally come out that far though (save for the 2 hourly Virgin, TPX and XC stuff), so you'll need Waverley. I camped out at the end of platform 16 the other day and could ID most stuff but nothing on 1-4 or 7-10. 3 and 4 are usually quiet and just the North Berwick/Tweedbank services using them, but even the Edinburgh to Glasgow stuff can use 7 and did on one occasion on Friday. Some of the ECML stuff uses 2, and 8/9 get a surprising amount of use now.
DMUs on the Glasgow side live at Eastfield depot, seen on the right hand side heading towards Bishopbriggs coming from Glasgow. You will need to write fast here, as by the time you get out here you'll be going at a fair rate of knots. Viewing it after 4pm is pointless, as it's more or less completely deserted by then. Getting to Queen Street between 3 and 4 will get you quite a few 156s, 158s and 170s.
EMUs in Glasgow, you can pass Yoker depot on the trains (left hand side when heading away from Glasgow) but won't have much on in the daytime. As per other depots, it'll be empty by about 4pm for a few hours. Hyndland is the best place to spot them though, you'll get loads there in a couple of hours.
Paisley Gilmour Street is good for 380s but the best spot overall is at Glasgow Central, country end of platforms 1 or 10 will get you almost everything in and out. Lots of movements out of Corkerhill and Shields depots between half 3 and 4, but I would advise asking someone else for confirmation.
