Depends on where you go, but renting an inboard can be spendy, if they have them at all. Most places rent out something along the lines of an old SN2000 if they do have an inboard as an option. Forget getting one with a decent ballast system and they will probably frown on you loading it up with sacks. Not to mention you have to tune in the wake on a whole new boat.
I looked into renting a boat on a trip to Shasta last year. Only 3 places rent inboards, and the prices are kinda spendy for what you're getting. Towing definitely looks like an attractive option compared to this
http://lakeshasta.com/toybox.html $350/day or $1825/week for a Ski Nautique with tower
http://houseboats.com/vessels/malibu-wakesetter/ $550/day or $2,750/week for a Direct Drive Wakesetter
http://houseboats.com/vessels/centurion-wakeboard/ $750/day or $3,750/week for a Avalance or Air Warrior with Ballast and Perfect Pass
Obviously prices and options vary on your location, so there may be better options where you're heading, but at those prices, towing looks more attractive. You could even buy a trailer for the cost of a weeks rental. Check this thread on planet nautique. A guy on there is selling his for a SANTE 210, it might fit your G23. It's in NC. Might be worth seeing if he still has it.
http://www.planetnautique.com/vb3/sh...iler-2-900-OBO