For dental stuff, dh and I have always made appts together so that we can trade off. As for the other visits, one of the best decisions that I have made was to have our family Dr deliver my baby on the way- so he sees me, and takes care of my pregnancy, and sees dd. Between my ob checkups and a recent crisis with dd and a hand injury, we've been to the clinic probably ten times int helast two months or so.
: But they are really good with her, and are used to having little ones running around. In fact, I was there today for a combination ob check and well baby check for dd, and they got to witness one of her full-blown tantrums, and the Dr just smiled at me and kept talking while we figured it out.
Now if there was a time where dh was home and it was a check up for just me, I would probably leave her home with him, but it hasn't been a huge issue up till now.