Winter Outdoor Ceremony in Maryland?

I am having a dilemma with my ceremony. Obviously, every bride is struggling right now with planning in the middle of a pandemic, but I am having a THE HARDEST time figuring out what to do with my ceremony. My original date was Feb 27, 2021 and I was going to have the ceremony at a local church & our cocktail hour/reception not too far at a lodge. With everything thats going on we moved it to Dec 4th, 2021 in hopes that by the end of the year we would have more of a hold on "normalcy". To date, no churches in Montgomery County (that are accepting to our marriage) are taking events so I started to look into other venues around the area. We found a civil church that could work but is about ~40mins away from already booked reception venue with no parking and directly in the city on the street. We also found a beautiful botanical garden available, but not ideal in what we were wanting aesthetically for an indoor ceremony and its on the pricer side; plus, we would have to rent our furniture. We could also with this venue do an outdoor wedding in a beautiful area, but we would need to pay same price plus heaters. Our third option is our reception venue. It has a flat patio available outside for a ceremony for a small fee. We are not allowed to rent a tent, but we can rent heaters. If we were to do a ceremony with heaters, provide blankets, inform our guest we will be outside for 30 minutes, have the cocktail hour/reception ready and cozy with a fire lit, do you think our guests will hate us? I am worried for my grandparents mainly.. My fiancé really is pushing for outside and I am just hesitant because it will be 45ish degree weather and what would be our plan B? Idk what to do but I need to make a decision soon.