Just finished working out a six-day route, with stops at Ichetucknee Springs (private campground; they allow hammocks) and Fanning Springs State Park (we'll probably stay at the primitive area, right on the Suwannee, but there are cabins with central A/C available if anyone wants to shell out $100/night; they sleep up to eight, so ~$15 a head). Map is located here
I've ridden everything up until the actual trip from Ichetucknee to Fanning Springs. Looking at Google Maps, it seems that there will be a bike lane the whole way from Ichetucknee to Fanning (or it'll be on either low-speed-limit side roads with sidewalks or the Nature Coast State Trail rail-trail).
However, leaving Fanning, the bike lane disappears south of Chiefland. I absolutely need to do a physical recon of CR 345; that's where the bike lane ends. (And I should probably do a recon of the route from Ichetucknee to Fanning, just to be sure.) From Street View, it looks like a low-traffic rural area...but it's the sort of thing that I'll want to check out in person. It also appears that there are a few back road alternates that might be better bets for traffic conditions, depending on how we handle water and food for that day. I'll keep an update running as things develop...
The longest day thus far is the trip up to Ichetucknee; that'll be 48 miles and change. I deliberately routed things through downtown Gainesville, which adds a couple of miles: there are several very nice coffee shops and eateries in the area that are worth hitting on the way through. Also, this ensures a bike lane (almost) the whole way (there's a small stretch with a sidewalk, instead), as well as avoiding the worst traffic on 441 (13th St.) around campus in midtown. Trust me, riding that stretch of 441 is worth more'n your life; students have no idea how to deal with bicyclists on the road when there's no bike lane.
As we enter Ichetucknee, there is a Dollar General, which is a good resupply point for dinner and breakfast items. It's one of the easier ones to get to without a side trip if anyone needs/wants something that they may have not gotten at a gas station or one of the small shops in Micanopy the day before.
Resupply isn't quite as critical on a bike tour like this, as you can "credit card" tour; that is, eat lunch and snacks on the road at gas stations and restaurants. However, I prefer eating breakfast and dinner in camp--which means, for me, trucking that food along. If others have strong preferences otherwise, well, I'm willing to be accommodating, for sure.