Oh, also, I'm going to show you which route the company has taken from Ivarstead to Kynesgrove:
[url=http://skyrim.coolaps.com/?lang=en&mid=250] Interactive map of Skyrim - very useful!

So, if you leave all the keys on the map, you can work out which path they've taken:

Ivarstead to Shroud Hearth Barrow: 1 Day
SHB to Darkwater Pass: 3 Days
Darkwater Pass to Eastern Bridge: 1 Day
Eastern Bridge to Atronach Stone: 1 Day
Atronach Stone to Eldergleam Sanctuary: 2 days (going through the river) [i]or[/i] 3 days (going around the river)
ES to Bownstrew Crest (Although a dragon roosting spot, we won't be having a dragon there yet): 2 days
BC to Witchmist Grove: 2-3 Days.
Witchmist Grove to Kynesgrove: 1 Day
Kynesgrove to Burial Site: 1-2 Days.

This is including time spent resting, hunting for food, cooking food, sleeping, drinking, and fighting enemies.
Also, the map makers and just being used for reference - the entering of these areas will not take place, so your characters can actually visit them in real-time, and not just in the timeskip. Our group will be resting and camping by rivers and creeks, in cleared out caves (Not deep ones; just the hollows of rock you find bears and such in), and unmarked abandoned houses or shacks, etc.

So, hope this helps out!