Dancing or no dancing

I think no alcohol is fine.

for the dancing do you mainly want to do your first dance and a dance with your dad? if so, maybe you could even just make a small amount of space somewhere so that you could have that? you don't need a DJ for a small wedding so long as you can get a speaker and a playlist off a phone at least.

If you are just wanting to have a dance with your FH and father, I say bring a speaker and play the two songs (a third song if you FH would like to dance with his mother/a special lady in his life), so you can enjoy those special moments.