Tripod depends on the shooting conditions. If it is windy I use a converted tripod originally intended for use with laser instruments at building sites and a Gitzo no 4 head. This tripod weighs 15kg and supports my weight without any trouble.
If the conditions are normal I use a Manfrotto 190 with 4x5 field cameras. No need to carry more than you have to. Light tripods can be weighed down if necessary.