Based on my knowledge of those schools, any of them will have research opportunities available if you're dedicated enough to look for them. I'd go to whichever school will allow you to graduate with the least debt, as your debt levels on graduation from vet school will be the biggest factor in how much job flexibility you have.
Or even better... if research is the main career goal, perhaps look into not going to vet school at all. Unless you have a specific goal that requires a DVM (or makes it extremely advantageous to have one), you can go and get a PhD without accumulating any debt. Tuition covered, AND stipend received for living costs. That definitely beats paying tuition + cost of living for 4 years of vet school. Only exception to that would be if you can get one of very few spots every year in a funded combined program. But unless you get extraordinary research experiences during undergrad, I don't think it's a realistic expectation to snag one of these spots straight out of UG. So all of your research experience doesn't necessarily have to come from UG experience either. I personally had 0 during UG, and did full-time research for 2 years after graduation.
I agree with above posters to test it out first. Don't commit yourself to a DVM/PhD career track yet and tunnel vision only on those opportunities just yet. You can get research experience to some degree no matter where you go, and unless you have very specific things you want to go into, there's no reason to location restrict. Chances are, you'll be scavenging for opportunities anyway wherever you go, rather than having the luxury of picking the lab, project, and job description you want. If you
are planning to get all of your research experience during UG though, make sure you keep your eyes wiiiide open. Don't just base your career decision based on whether you enjoy what
you are doing as an UG research student, or even what the grad students are doing. Make sure you really try to look from the perspective of a PI, because the job descriptions are very different. I personally think doing full-time work where you're really considered a part of the research team with important responsibilities in the lab (whether it be as a thesis-based master's student or a technician) is important if you really are considering a career in research for that reason. If you work it right, you can get funding for a masters so in either case, you won't be making that much money, but you won't be putting yourself in any extra debt... so *I* think it would be worth it to really investigate whether $120k+ in vet school debt is the best course of action. Plus, that'll give you the research experience to boost your chances of getting a funded combined degree if you still think that's the way to go.
Just know that there are so many different ways to end up with both a DVM and PhD. Some are more costly than others, and some paths are less time efficient. But regardless the combined time and money investment is likely to be huge, so you want to be absolutely sure what your career goals are and the best course of action to get there.