소비자들은 자신의 여행을 직접 설계하는 것을 선호한다. If I were you I will choose this sentence in Korean translation. Both sentence you presented seems not natural, still meaning is not pretty different, except you miss some words. There is no words represent '자율적 선택' to English word in your sentence. So I strongly recommend you my sentence. Hope it was helpful. Ask more if you want :D

Other than 여행에(->여행을), your sentences are grammatically correct. I would choose the first one between the two. The sentences seem too long and formal, however, and some expressions are awkward. - 자율적 선택으로: overly detailed("of one's own, independent choice"?). 스스로, 손수, and 직접 all suit "on one's own". - 찾아 떠나는 것을: fine for "going to places of one's choosing", but the original only said "plan" (계획하다, 설계하다). - 선택하여 사용할 수 있어서: grammatically fine, but has a slightly different meaning than planning a trip. - 더 선호한다: 선호하다 is the same as 더 좋아하다, so it is better to leave out the redundant 더. You can say the phrase in many different ways: - 소비자들은 여행을 스스로 계획하길 선호한다. - 여행자들은 자기가 손수 계획한 여행을 선호한다. - 소비자는 자기 여행을 직접 설계해서 가고 싶어한다. - 여행자들은 (여행) 일정을 자기가 짜는 것을 더 좋아한다. (여행 일정을 짜다 = plan the itinerary of a trip)

you have to add `을` after `여행` instead of `에` because `여행` is an object in these sentences. so >>소비자들은 여행을 자율적 선택으로 찾아 떠나는 것을 더 선호한다. >>소비자들은 여행을 자율적으로 선택하여 사용할 수 있어서 더 선호한다.