Northeast - Anyone here familiar with Northern VT?

A few of my friends living in VT are planning a 30-40 mile bike ride to take place in a little over a month. I looked through this subforum to find some VT-related posts, but didn't find much useful info. The tour will take us from Johnson to Burlington, primarily via route 15.
I'm currently living in NYC, and surprise surprise ride a fixed gear with moderate gearing (46/18). This is obviously fine for the city which is mostly flat, but will I be okay for this ride? I know very little about rt. 15 other than it has several downhill sections--none of my friends are really cyclists and so don't pay attention to the topography of the route in the way most cyclists do. I don't really have a problem with not-too-long lengths of subtle grade, but if it gets too long or too steep I probably won't be able to hang for too long.
So what do you guys think? Will I be okay with my track bike or should I try to snag something with gears for the ride? Anyone who has first hand knowledge of the area in question, it would be great to hear from you. Thanks in advance!

Although I haven't ridden this ride, you may end up having a less than wonderful experience riding a fixie. Even if the ride were described as easy-moderate, the hills will be much harder than anything you'll be used to in NYC. With gears, you'll be able to do it and probably do it well. I'm a Clyde and often do rides labled "moderate" in VT. You need to realize that moderate in VT is not nearly the same thing as moderate in other places. The scenery is beautiful, and I hope you have a great trip!

It's not something I would attempt on a 46/18. There's plenty of hills on that route. Make sure you get off rt 15 in Jeffersonville and take Pleasant Valley Road - it's beautiful and will have much less traffic. Traffic on 15 will really suck the closer you get to Burlington.

My home land......

A derailleur will be your friend my friend.

From Underhill to B-town expect a lot of traffic.

hills? you are talking about Vermont right? one thing just to impress yourself is to use google earth or mapmyride or some other route mapping site to build a route map and see what exactly you'll be facing. 1+ on that alternate route. would think 15 to be crowded? been a few years since I was at school in Johnson but I doubt the hills have gotten smaller? you'll want more options than a single speed.

I'm from NH and haven't biked up in that part of VT but know the B-town area well, and yes...they are considered hills. Probably a really good look at the route via a topo map will give you a good idea of the ups and downs of the route as well as how steep it may get.

I ride thousands of miles all over the area in question. There is nothing long or steep between Johnson and Burlington and I know people who ride the area on fixed gear bikes. The stretch of rt 15 between Essex Junction and Winooski blows. Other routes would add some mileage, but that's not a bad thing in my book. I live a few towns north of Burlington and whenever I ride there I always go through Mallets Bay and pick up the bike path at Colchester point. Leads right down to the Burlington Waterfront. Any questions... fire away.