It really depends on the type of community/online friends that you are meeting with. In the first place, how did you connect with them online? I'm guessing through a common hobby/interest and nothing close to shady. For example, a group of online moms is safer as compared to a generic online group (higher chances of creeps).

Might as well, bring a friend, most especially if they're also part of the same group. Worst case scenario, think of an exit strategy as well. Let's say the group you are meeting is safe, but maybe not your cup of tea, then at least you can politely exit as needed. :)