Looks like there are few ways to go although only one bridge accross the creek. The bit that I like the look of the most is the new country park I've not been there yet (i don't live there anymore) but in the car on saturday it looks like lots of nice wide dual use cycle / ped paths through the country park. Something like this
http://www.gpsies.com/map.do?fileId=iqmhmfxuetewxxaz or this
http://www.gpsies.com/map.do?fileId=hjtlwdwehdziakwn
In the early days of the Whitstable rides, when it was all fields round there, we used to cross the A 249 using the footbridge just to the north of Howt Green.
The reason we stopped using it was because of the junction at the end of Bramfield Lane - which at that time of day is already busy with traffic, and it's blind to the fast traffic coming up from the right, is essentially a nightmare to either cross straight across, or to turn right and drop down the hill into Sittingbourne.
As the rides have grown in size the problem has been compounded. We also used to lose people at the turn to the footbridge, and ended up having to chase them down when they were half way to Sheerness. That was the point at which DZ tweaked the route to take us through Milton Regis and past Sittingbourne station - admittedly not the lovliest, but definitely the safer option. If you've not been through that part of Sittingbourne since last year, you are in for a surprise. Eurolink way is so disgusting that I'm not prepared to talk about it without my solicitor present.
EDIT:There are urban / industrial wastelands which do attract (heavens knows, I've organised more than a few rides to these) But Eurolink is not one of them. No. That is all.