No personal experience, but when my son was considering JUCO we did some extensive searching of DI rosters. What we found out was that there are some coaches who do not bring in JUCO players. Maybe they want to start a freshman in "their" system with "their" philosophies. Most have no problem with bringing in a JUCO player to fill a specific need (starter right away). Some will bring in all the JUCO players they can handle.
If there are specific college's you are targeting, do your homework. It's not always easy to do and there are no absolutes, but at least you won't be totally defenseless.
Also check the JUCO BEFORE you sign the NLI. A school's track record in placing players at the next level should be a must. Certain DI's use certain JUCO's as a feeding ground for their players.
As far as marketing yourself, I would imagine it's like HS all over again. I would think the JUCO coach will make every attempt at getting their players placed at the highest level of ability.
JMHO which usually isn't worth much.
Frank