The answer to your original question is yes, you can redeem Aeroplan points for tickets for anyone you want - yourself, your spouse, your parents, me, Joe Blow on the street.

As for this trip though, Aeroplan has no affiliation with Allegiant, so your points aren't going to help you on this one, unless you use them to fly Air Canada or United instead.

Lastly, 30,000 Aeroplan points would only cover one ticket from Vancouver to Vegas (25,000 points).