Anyone have any suggestions for a smallish rental car that will hold two 24" MUnis and gear in a trunk for a three day weekend?
Be cool on and off the unicycles, rent a Mini-Cooper! 
--chirokid–
I’d say Muni’s would fit in most cars along with gear and other people. I reckon get a 4 door because that way you can have gear in the boot and unicycles easily accessable in the back seat. They will fit into a two door too but it’s a pain folding down the seat to get to the back. If some people fit two unicycles in a sack, surely you will have no trouble squeezing them into a vehicle. Enjoy the three day weekend teachndad!
A Ford Taurus has a nice large trunk. For muni weekends and such I’ll usually try to rent a Taurus.
Two munis are easy to fit in most trunks, even the cars smaller than the Taurus. One trick for making more unicycles fit in a trunk is to remove the pedals. A unicycle with no pedals takes a lot less space and is easier to fit in the trunk. When you get to the ride destination put the pedals back on. Just remember to bring a good pedal wrench.
Go for a four door car so you have easier access to the back seats for throwing gear and luggage in the back seat.
John Childs’ advice sounds real good. You get a much bigger trunk with the bigger sedans. Sometimes it’s only a few dollars more per day also. Jacquie and I were originally presented with a Buick Century for NAUCC, but it was too grandparent-looking so we opted for a 2-door Monte Carlo. The lack of back doors was a pain, but the car looked a lot cooler and had a cavernous trunk.
Don’t forget to allow space for your luggage as it will be packed for the trip to and from the airport. Also, if you aim large and pick up a passenger or two for the longer drives (assuming you’re thinking MUni Weekend), they could chip in for the price difference on the bigger vehicle.