The different things that can help each have flaws and are somewhat dependent on others (masking, distancing). The only solution that (I hope) proves far more effective and which is totally under my control is a vaccine. Time will tell.
I sincerely hope that a good vaccine will appear as soon as possible so that you can feel safer about resuming your (postponed) travels.
I didn't quite understand your statement that the vaccine is a factor that is "totally under my control". I would think otherwise : the vaccine is still one of the greatest unknowns in this game, and one might be far off better doing what is basically the most simple and responsible way of action - plan so that your exposure to the virus is minimal. That is, if travel is very important to you. This is much more in your hands than the still-unknown level of security a vaccine might afford.
Just this week
"The Lancet" published a report by a group called the "UK's Government Vaccine Taskforce". It's an interesting read, and tries to warn of the trend towards over-optimism with regards the potential Covid vaccine. Here are some excerpts :
"No vaccine in the history of medicine has been as eagerly anticipated as that to protect against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Vaccination is widely regarded as the only true exit strategy from the pandemic that is currently spreading globally."
"However, we do not know that we will ever have a vaccine at all. It is important to guard against complacency and over-optimism. The first generation of vaccines is likely to be imperfect, and we should be prepared that they might not prevent infection but rather reduce symptoms, and, even then, might not work for everyone or for long."
"The most advanced vaccines, such as those developed by AstraZeneca and the University of Oxford, BioNTech and Pfizer, and Janssen, are based on novel formats for which we have little experience of their use as vaccines, although the initial immunogenicity and safety data are encouraging. Vaccines based on frequently used vaccine formats, such as adjuvanted protein vaccines developed by Novavax, and by GSK and Sanofi, and inactivated whole viruses developed by Valneva, will not be available until late in 2021."
"A major challenge is that the global manufacturing capacity for vaccines is vastly inadequate for the billions of doses that are needed, and the UK manufacturing capability to date has been equally scarce."
"No-one has ever done mass vaccination of adults anywhere in the world before and the two-dose regimen, plus cold-chain restrictions for some vaccines, adds to the complexity of this deployment operation."
"There will not be one successful vaccine, or one single country, that is able to supply the world. We urgently need international cooperation to pool risks and costs, address barriers to access, and scale up the manufacturing capacity to produce sufficient doses to protect everyone at risk of SARS-CoV-2 infection globally."
"The SARS-CoV-2 virus is likely to evolve, and other zoonotic pathogens are likely to pose future risks. China, Europe, the USA, and the UK need to work together. "
IAC, good luck.