But Becca shared she wouldn't be against televising the reception or post-ceremony party.
"I understand people have been with me since the beginning," Becca said, referring to her journey on The Bachelor franchise.
"They know me from The Bachelor, getting proposed to multiple times and not seeing that full story come together. I understand why people would want to maybe see that at some point. But if it happens, it happens.
Becca was previously engaged to Arie Luyendyk Jr., with whom she fell in love on The Bachelor's 22nd season.
Becca never thought she'd appear on Bachelor in Paradise, but she decided to give it a chance last summer. Becca met Thomas in Mexico on the show's seventh season, and the pair flourished and thrived in the real world.
"I've learned I can't say no to anything because when I say no, it always ends up happening," Becca said of possibly televising part of her nuptials.
"If it can be done tastefully and respectfully and true to who we are, maybe," she added. "I'm not saying yes. I'm not saying no."
Becca confirmed she and Thomas have been planning their wedding but still need to finalize major details -- including the date and venue.
"We initially wanted to do it around my dad's birthday just because it has such a special date," Becca said of her late father.
"We're hoping October, but we want to keep it very small, very intimate so it would just be immediate family. We might elope. We would love to do it in Ojai, which is such a special place to us."
But then Becca shared how they're also considering a wedding in January 2024 and having "a big party like '20s-Gatsby-champagne-towers theme where it's more of just a celebration."
Becca insisted her wedding celebration "will not be traditional by any means" and she wants her guests to have an awesome time.
"We're going to have food trucks and games and a live swing band there," Becca said.
"Most of my family and friends will be traveling through Minnesota so I want it to be more of an experience for them where they can celebrate all weekend and not just four hours of a ceremony and a sit-down meal."
She continued, "I just want everyone to mingle and have a good time. That's what we're aiming for. I say that now, but we don't have anything set."
"I don't even know if we'll be able to do next year -- we have so many weddings we are going to that are all over the world, so when are we going to be able to find a time that we can get married?! All of our friends are hogging all the weekends!" Becca joked.
Becca shared how she was thinking about getting married near their home or doing something spontaneous.
"We think we'll do San Diego or we'll just elope. But I told him once we get through the house, we can talk about it. One thing at a time!" Becca revealed.
Thomas was already sold on marrying Becca in November 2021, when he told Hollywood Life that he was in "the most healthy, normal relationship."
And during an October 2021 episode of the "Talking It Out with Bachelor Nation" podcast, Thomas gushed of Becca, "I don't want to spend my life with anybody else... I wouldn't want to wake up next to anybody else."
On Bachelor in Paradise's seventh-season finale, Becca was shown breaking up with Thomas and crushing his heart before overnight Fantasy Suite dates because, despite having "an incredible start" to a relationship, Becca didn't want to leave The Bachelor franchise for the third time with a man unless she knew everything about him, including how he'd face adversity and real-life challenges.
However, the finale concluded with an update on Becca and Thomas' relationship, revealing how they had reunited after filming ended and were dating, "happy and in love."
During Becca and Thomas' appearance on "Talking It Out" last year, Becca revealed she's the one who tracked down Thomas' phone number and initiated their reunion.
"After we ended things, I think I waited a couple days. I didn't have my phone right away and he didn't have his phone right away, so I think I gave it two days," Becca said.
Becca said she and Thomas had reunited in San Diego and picked up right where they had left off, with no hesitation about dating again from either person.
Becca also boasted about how Thomas is different from her past relationships.
In addition to saying Thomas is so passionate about their relationship and prepared to fight "tooth and nail" for her, she added last year, "He is so supportive and he's just funny and quirky in the cutest ways."
"Everything about him, I just felt safe with," Becca continued, "unlike anything I had in the past. I was just like, 'This guy is my guy.'"
Becca even told her mother last year, not long after Paradise ended, that she wanted to marry Thomas, who initially came across like a villain on Katie Thurston's The Bachelorette season.
Despite having been engaged twice before, Becca admitted at the time, "It's the first time I've ever actually said that out loud."