I faced the same question going on holiday a few months ago, and ended up taking just the D700 with 28 mf, 35 af, 50 mf and 85 af. No regrets there.
If I were you (I'm not) I'd take the D300 with your two favourite fixed focal length lenses (14 and 35?) and the FE with a 35 and Tri-X. But that's just me.