There are no rules for logo creation.
Whatever works to convey the brand is the best option. If that brand sees the name of the company as imperative, then camel case (uppercase letters mid-word) may be a good idea.
FedEx, BlackBerry, PayPal, among others choose camel case as well as a tonal variation - i.e. "Fed" in blue, "Ex" in orange - "Pay" in dark blue, "Pal" in light blue.
Basically.. it's whatever works.
However, one should be always take into account how combined words, without any camel case, may be unintentionally read...
- handson -- HandsOn or HandSon?
- newshits -- NewsHits or NewShits?
- teachersexchange -- TeachersExchange or TeacherSexChange?
Camel case helps ensure proper intended reading at times. The purpose of camel case is to visually introduce some separation between the combined words.
Based on the comment under the question.. if there is a separator, such as
right<away>, then it really doesn't matter. With a separator present, the visual differentiation is already present. So, case becomes largely irrelevant.