Towers are the most effective thing to use if you are looking for max altitude. Downside is they are big and you have to build them, haul them out to the launch site and set them up. If you are heading out to the desert and really want to crank up the altitude, it is a good trade off.
For regular club launches, especially on the East coast where it is virtually impossible to max out most minimum diameter flights, due to the lower max waivers, fly-away rail guides are way easier.
I finally bit the bullet last year and invested in a full set set of these rail guides from Additive Aerospace:
https://www.additiveaerospace.com/products/fly-away-rail-guides
They are not cheap, but they work perfectly every time and are very well built. I have started using them on all my rockets, 4" diameter and below. Slap a fly-away guide on out at the pad, slide it on the rail and done. I have a few very tall rockets/oddrocks they aren't well-suited for, but they work great on the vast majority of my rockets.