I do that fairly often. During the winter, my hair needs more moisture so I do use a rinse out as well as a leave in. During the spring and summer, that usually weighs my hair down so I "listen" closely to my hair. If it feels dry, then I'll use both, otherwise I just use a leave in.
3a, baby fine i/ii, low to normal porosity, protein sensitive
Mod CG since 5/12, from rainy Western WA
dislikes: glycerin, wheat protein
Likes: moisture, Mag Sulfate
Poo: Elucence Moisture Acidifying Shampoo
Cond: CJCR, DB pumpkin seed, TJ TTT, Elucence MB
Protein: one & only Argan oil hydrating mask
Style: UFD curly magic, Sweet Curls Elixers flax seed cream and HHG (Etsy)