One can be saved without ever reading the Bible. However, I think that if one is going to witness to others, you should base it on the Word of God. How foolish we would look to non-believers if we said that Scripture is the inspired word of God, but that you have to pick and choose what is to be taken literally based on current science. How absurd, especially when science is not the pursuit of absolute truth, but rather consensus.
Now if the Bible said the earth was flat or that the sun and the stars rotate around a stationary earth, there would be a conflict between Gods word and His general revelation. I have not found even one instance where any statements found in Scripture are counter to true scientific evidence if each are studied in depth. This includes the entire creation account, and the Global Flood etc.
Just for the record regarding your survey
To take Genesis literally, does NOT automatically translate to a Young Earth Creation model. I actually believe the "YEC" model actually does more harm than good, and am very disappointed that ministries like AiG and ICR are so dogmatic supporting it. It makes no sense to me how they can say that the earth was created first and then all the stars and matter in the universe days later some 6,000 years ago. That doesnt fit with Gods general revelation and forces one to come up with all kinds of theories about apparent age etc. It also forces language constructs that are not consistent with how the plain reading of Scripture was intended, including the insertion of words for clarity that actually change the meaning.
Case in point:
A. Genesis 1:1; is not a heading or overview statement.
B. Genesis 1:16; does not say he made the stars also, but rather with stars. The meaning being that the moon was to rule the night with the stars (that were already there).
C. Exodus 20:11; dos not say For in six days God created.. but rather For six days God worked on (aasaah)
See the totally different meaning?
So a different model of creation that I believe is true to the word of God and His general revelation, without the need for additional theories is this:
1. The universe with stars and the earth in an unfinished state existed for an undefined amount of time prior to the creation week;
2. The first act of the creation week was the infusion of light on the surface of the deep. This was light from God and not the sun.
3. The work to make the earth habitable and the creation of all the original biology in the planet took place during a six literal day period, some 6,118 years ago;
4. The sun and moon were put into their current place on the fourth day.
5. Genesis 1 defines two Heavens: Lower Heaven is the firmament between the waters from the sea to the bottom of the upper waters (cloud layer); and Upper Heaven is the firmament from the bottom of the cloud layer and continues up into space to include at least the visible stars.
6. Genesis 1 & 2 define the Earth (world, globe); Land (dry land, continents); and ground (dirt, soil). These definitions can be used to prove that Scripture describes a global catastrophic flood in Noahs time.
This model has been called YBC for Young Biological Creation. There could be inorganic materials on earth and observations of space that show greater ages than 6,000 years without creating any conflict with this model. Additionally, I have not had any YEC show me a scriptural conflict that makes any sense. I think any model that has the earth and all its biology along with the universe as being all old or all young is inherently wrong.