Horticultural and botanical "no tripod"strategy?

Being fairly close to some world class horticultural and botanical centers I thought i might try to capture some macro shots in the indoor conservatories. Unfortunately, a few of these places have "no tripod" rules in place to limit either commercial license issues and/or limit congestion/traffic from setting up a tripod and blocking access. How are folks dealing with "no tripod" limitations in these situation? Specifically from an equipment perspective (ISO, flash, stops, stabilization, shutter speed, etc...)?

I have the Kenko extension tube set as was recommended here a few months ago and a healthy assortment of primes, zooms and dedicated macros.