Hi!
I'm currently running Shadowdale, The Scouring of the Land adventure and got two questions aboute the feys part in the rebellion.
1. I'm unfamiliar with the fey backroads and the portals. Found some information about them in Magic of Faerun and understands how they work. But I can't find any information about where the portals are located. Does anyone know where they are or have made up some smart solution?
2. The PCs forge an alliance with Shadowdale's fey races and get some help from them (ridning on pegasi aint bad). I would like to create some events around this part but are not sure of what kind fey creatures there are in the Living forest? Is there anyone who know..... or don't know but have populated the forest on their own?
Thanks in advance
AFAIK, Magic of Faerun was the first and only reference to fae backroads. There might have been a few others in adventures, LFR particularly, but as I've never been one to use modules, that's only a guess.
As to what creatures are there, given that they are fae, I'd say whichever ones felt like being there. They're an unpredictable lot to say the least, and anything that doesn't mind a relatively temperate forest could be included.
I've used Fey Backroads in a couple of games a few years back. In so far as what fey/fae inhabited the Mound/Portal, I made it mysterious. The players mostly felt the presence of some being that actually seeing it. There was a price or bargain to be struck (or task to be carried out) as one of the players was a druid. I also made up some elven names for locations that the being of the portal, knew. Once the party fulfilled their end of the task the being was eager to allow travel. Upon arrival of their destination, which was in the Nether Mountains called Turnstone Pass, an entity there demanded the players identify themselves. This one had a totally different attitude/voice and was curious about where they came from, where they were going, who they are, what might they hope to accomplish, and why. That was the fee at that end. I also allowed one of the players a glimpse of something but as he tried to focus on what he saw it had already faded into the outline of trees in the surrounding grove. I made these ancient beings who also had powerful druid spells but bound to some unknown pact with various Nature Gods (never just one).
As the latest, even shittier, forum software is so backwards that it's difficult to tell which part of a reply is a quote I will simply reply to your questions, @hardbe, in seriatim:
1. Fey crossroads were never explored in 3.xE beyond the passing mention in Magic of Faerûn. The 4E versions, fey crossings, got a better treatment largely because the Feywild became so integrated with its versions of D&D worlds.
In Shadowdale, I would suggest placing fey crossroads in Toad Knoll (this leads to a swampy area of the Plane of Faerie or whatever it is called populated by toad-shaped toadstools), the Druidic Circle and Harper's Hill. Just remember, if you're going to have these used by the PCs you need to have a vision for what your Plane of Faerie is like.
2. As for what fey races are present, this also depends on what you classify as fey. The easiest thing to do is to include the classics such as dryads, nymphs, pixies and sylphs. You could make the nymph the queen, the sylphs her handmaidens, the dryads her spies and the pixies her messengers, et voila, you have a fey court your PCs can interact with.
Thanks a lot for the replies. 
I will use a mix of the suggestions above with what i read in Magic of Faerun and in the adventure.
/Hardbe