Go with some raw wheat if you can get it. you could even toast it a bit. then cook it the night before or overnight in the slow cooker. then get it to mash temp and add it right in. if you cook it long enough it will gelantenize all the starch which doesn't happen well at 148 in the mash without grinding the wheat to flour.
Saison is one style where I feel you can get a bit more complex with it. I like a flaked or malted or raw non-barley grain, sometimes two, and some flavorfull sugar. If I'm brewing it fairly big (>1.070 say) and I dind't have really characterful sugar available I might add some table sugar but I would more likely try to get some sugar within a few days of pitching yeast and then add it to the fermenter. This is a good way to use honey in saison as well, add it after fermentation has slowed to help preserve a bit of honey flavor/aroma.